IDENTIFICATION OF PARTS AND ASSEMBLIES
**** Hidden Message ***** MCDONNELL DOUGLAS CORPORATION PROPRIETARY RIGHTS ARE INCLUDED IN THE INFORMATION DISCLOSED HEREIN. RECIPIENT BY ACCEPTING THIS DOCUMENT AGREES THAT NEITHERTHIS DOCUMENT NOR THE INFORMATION DISCLOSED HEREIN NOR ANY PART THEREOF SHALL BE REPRODUCED OR TRANSFERRED TO OTHER DOCUMENTS OR USED OR DISCLOSED TO
OTHERS FOR MANUFACTURING OR FOR ANY OTHER PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING BY MCDONNELL DOUGLAS CORPORATION.
UNPUBLISHED - CREATED ON PREPARATION DATE OF THIS DOCUMENT. ALL RIGHTS RESERVED UNDER THE COPYRIGHT LAWS BY MCDONNELL DOUGLAS CORPORATION.
DAC 25-1710 (REV. 2 AUG 2002)
PROCESS ENGINEERING ORDER SHEET 1 OF 1 DPS 3.02
DOUGLAS AIRCRAFT COMPANY
DATE 05-20-03 1 COMPLETE REVISION BL LONG BEACH, CA
DATE 2 ADVANCE CHANGE
TITLE DATE 3 SERIALIZED CHANGE
IDENTIFICATION OF PARTS AND ASSEMBLIES DATE 4 NEW
DATE 5 REISSUE TO REVISE
HANDLING INSTRUCTIONS (HI):
2. COMPLY AT SPECIFIED EFFECTIVITY.
3. COMPLY WHEN INVOKED BY DRAWING OR OTHER AUTHORITY.
4. COMPLIANCE OPTIONAL; NO ENGRG. REQUIREMENT.
5. NOTED.
RELEASE APPROVALS
PARA. MODEL
HI.
NO. EFFECTIVITY
PEO MADE BY: DER COML - M&P
All Coml 2 On or before July 1, 2003
J. Harpt MAFW 05-20-03
CUSTODIAN COML - M&P BACK-UP COML - M&P
J. Harpt 03-16-03 J. Robinson 05-19-03
GOVERNMENT - M&P GOVERNMENT - IPT
N/A N/A
DISTRIBUTION
X STANDARD
SPECIALTY MANUAL NUMBERS PRODUCT CONFIGURATION CONTROL
CLASS I X CLASS II
M&P QCB NO.
4178
LIMITED
CCN
D50R1N06
EWO
N/A
WRO
N/A
This PEO is authority to release DPS 3.02, Revision “BL”. This revision replaces and
includes Revision “BK”. This revision does not replace SPEO 95-041 (Limited).
♦ THIS DPS IS NOT APPLICABLE FOR C-17/GOVERNMENT/MILITARY USE ♦
♦♦♦ REFER TO DPS 3.02-17 ♦♦♦
Summary of Changes & Reasons:
1.2.3 - Changed to specify LBD drawings.
Reason: To clarify which drawings were being addressed.
4.1.1 - Changed spacing between the change letter and part number from a minimum
of 1/8” to two times the distance between the spacing in the part number.
Reason: To ensure the change letter does not appear to be part of the part
number when large spacing is used in the part number.
4.1.1
Note (2)
- Changed to add Note (2).
Reason: To address confusion regarding the designation of NC versus N/C.
JAH:ah
TABLE OF CONTENTS
Subject Page
DPS 3.02
IDENTIFICATION OF PARTS AND ASSEMBLIES
i
1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.5 Nameplate Substitution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.6 Planning Assigned Identification Systems . . . . . . . . . . . . . . . . . . . . . . . 2
1.6.1 Planning Variation Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.7 Acceptance Stamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.8 Supplemental Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.9 Identification of Production Parts or Assemblies for
Nonproduction Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.10 Interim Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.10.11 Removal or Reidentification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.10.12 Testing of Parts (Interim, Production and Nonproduction)
at Supplier’s Facility or Subtier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.11.1 Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.2 Subassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.3 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.4 Engineering Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.5 Planning Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.6 Planning Edition Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.7 Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.8 Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.9 Acceptance Stamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.10 Factory Serial Number (FSN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.11 Serial Version Number Control (SVNC) . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.12 Fuselage Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.11.13 Version Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. APPLICABLE DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. MATERIALS & SPECIAL EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1.1 Part Identification (see definition in paragraph 1.10) . . . . . . . . . . . . . . 9
4.1.2 Subassembly or Assembly Identification (See Definitions
in Paragraph 1.11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.3 Serial-Version Number Controlled (SVNC) Assembly Identification . 13
4.9 Permanent Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.12 Parts and Assemblies Purchased to Long Beach Division
Specification Control or Source Control Drawings . . . . . . . . . . . . . . . . 17
TABLE OF CONTENTS (Continued)
Subject Page
DPS 3.02
IDENTIFICATION OF PARTS AND ASSEMBLIES
ii
4.13 Parts and Assemblies Purchased by Supplier’s Part Number,
Industry Standards Drawings or LBD’s Standards Drawings . . . . . . . 18
4.13.1 Supplier’s Part Number or Industry’s Standards Drawing
(e.g., AN, NAS, MS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.13.2 LBD’s Standards Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.14 Identification of Castings (Die, Sand, Permanent Mold
and Investment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.14.1 Identification of Machined Complete Castings . . . . . . . . . . . . . . . . . . . 19
4.14.2 Identification of Castings Prior to Machining . . . . . . . . . . . . . . . . . . . . . 20
4.15 Identification of Rough Forgings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.16.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.16.2 Application Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.17 Special Spare Parts or Assembly Requirements . . . . . . . . . . . . . . . . . 21
4.17.1 Code Letter “N” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.17.2 Code Letters “SP” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5. INSTRUCTIONS/PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6. QUALITY CONFORMANCE/CONTROL PROVISIONS . . . . . . . . . . . 25
6.1 Process Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2 Quality Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3 Nonconformances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
IDENTIFICATION OF PARTS AND ASSEMBLIES
ISSUE OF 05-20-03
REPLACES REVISION “BK”
PAGE 1 OF 25
DPS 3.02
REVISION “BL”
DOUGLAS PROCESS STANDARD
MCDONNELL DOUGLAS CORPORATION
MCDONNELL DOUGLAS CORPORATION PROPRIETARY RIGHTS ARE INCLUDED IN THE INFORMATION DISCLOSED HEREIN. RECIPIENT BY ACCEPTING THIS
DOCUMENT AGREES THAT NEITHER THIS DOCUMENT NOR THE INFORMATION DISCLOSED HEREIN NOR ANY PART THEREOF SHALL BE REPRODUCED OR
TRANSFERRED TO OTHER DOCUMENTS OR USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR FOR ANY OTHER PURPOSE EXCEPT AS SPECIFICALLY
AUTHORIZED IN WRITING BY MCDONNELL DOUGLAS CORPORATION.
UNPUBLISHED - CREATED ON PREPARATION DATE OF THIS DOCUMENT. ALL RIGHTS
RESERVED UNDER THE COPYRIGHT LAWS BY MCDONNELL DOUGLAS CORPORATION.
DAC 25-1710 (REV. 5-90)
DOUGLAS AIRCRAFT COMPANY CODE IDENT. NO. 88277
1. SCOPE
1.1 This Process Standard covers part and assembly identification and marking
requirements and methods.
1.2 The requirements of this DPS are intended for identification after completion
of all fabrication operations. Refer to applicable material specification (i.e. DMS,
MIL-Spec, AMS, etc.) for required identification markings of extrusions, forgings and
castings prior to final machining. Temporary identification by means of appropriate
tags is recommended when parts are separated from their planning paper, such as in
heat treating or chemical processing operations or when permanent markings are not
required.
1.2.1 Tags or ties of metal are required to be of a metal in the same electrochemical
group (see DPS 4.025) as the metal of which the parts are fabricated.
1.2.2 The requirements of this DPS are not intended to change normal Design
Engineering and Planning operating practices unless specifically stated herein. Refer
to the Boeing - Long Beach Division (LBD) Drafting Manual for aircraft design
configuration control.
1.2.3 DPS 3.02 will define the part and assembly identification methods unless a
specific alternate method of identification is specified on the LBD Engineering drawing.
1.3 The requirements of this DPS do not apply to the following:
1.3.1 Electrical Wiring (except assemblies);
Commercial aircraft - See DPS 1.834-23
Military aircraft - See DPS 3.231
1.3.2 Contract End Items (no next assembly drawing).
1.3.3 For government applications, refer to DPS 3.02-17.
1.3.4 For supplier packaging requirements, refer to DPS 3.301.
DPS 3.02
Rev. “BL”
Page 2 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
1.4 In addition to the requirements of this DPS, other DPSs specify identification
requirements, markings, and methods for the following:
Bolts, Nuts and Screws
Fluid (Plumbing) Lines
Heat Treatment
Inspection Operations
Nonproduction Parts
Rivets
Raw Stock Metals
Rubber Products
Titanium
Transparencies
Washers
Welding
Wiring Assemblies
Other specific materials, parts, or assemblies
1.5 Nameplate Substitution - Where Engineering drawings specify nameplates to be
fabricated by the Graphotype machine process, photoetched nameplates fabricated per
DPS 9.49 are acceptable.
1.6 Planning Assigned Identification Systems - Engineering assemblies, customer
configurated by detail Finish Specification, and Planning assemblies may be identified
with numerical and/or alphabetical systems that do not necessarily correlate to an
Engineering assembly drawing.
1.6.1 Planning Variation Number - A Planning synthetic number which may be
assigned to various types of assembly planning documents when an assembly is
structured for a particular combination of engineering configurations.
NOTE: Planning variation numbers are developed and assigned by Planning
and are not to be confused with an Engineering Variation Drawing number.
(Reference paragraph 4.1.1.2.6.)
1.7 Acceptance Stamps - Parts and assemblies require an acceptance stamp,
subject to appearance and size limitations of this DPS, when manufactured to a LBD
Engineering drawing or to a LBD Specification Control or Source Control drawing. The
acceptance stamp is not a requirement on the following unless specifically required by
the planning paper or purchase order.
(a) Parts or assemblies with a supplier identification plate or label.
(b) Supplier part numbered parts.
(c) Industry standard drawings parts (e.g., AN, NAS, MS).
(d) LBD Standards drawings parts. (If raw metal standards are reidentified,
refer to DPS 3.54)
DPS 3.02
Rev. “BL”
Page 3 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
1.8 Supplemental Identification - In addition to the requirements of this DPS, parts
and assemblies may require supplemental identification. Parts and assemblies
manufactured at the Long Beach Division must be identified with the supplemental
identification specified by that component of the Boeing Company for which parts are
manufactured. As an example, LBD Fabrication (C1) procedures now specify to place
Form No. 65-1307 on tagged parts which were dispositioned as “Use-as-is” or “Repair”.
1.9 Identification of Production Parts or Assemblies for Nonproduction Usage -
Conforming production parts or assemblies required for Engineering Lab test,
development, mockup, tooling or other nonproduction usage shall be identified as
follows:
1.9.1 Nonproduction usage which may not render a production part unfit for later
production usage shall be identified by stenciling the letters “XC-” , 0.25 inch high, or as
large as possible (whichever is less), as a prefix to the production part or assembly
number using red solvent removable coating (DPM 5404-9324). These parts, as
prefixed, are not to be used in flight.
EXAMPLES: XC-1234567-1
or
XC-ABC4567-1
Note: All parts shall be reviewed after usage by Engineering
to determine if nonproduction usage caused damage to the
part. If deemed acceptable, the prefix shall be removed.
1.9.2 Nonproduction usage of a nonproduction part shall be identified by stenciling
the letter “X-”, as a prefix to the nonproduction part or assembly number using red
nonremovable coating (DMS 2433) per DPS 3.027 (Identification, Nonproduction Parts)
to preclude the possibility of use as a production part or assembly. These parts are not
to be used for any production requirement or installed on any aircraft.
EXAMPLES: X-1234567-1
or
X-ABC4567-1
1.9.2.1 Per DPS 3.027, the words “Not for Production Use” shall be applied when
part size or configuration permits. A stripe shall be marked completely across the part
when part size or configuration does not permit application of the words.
1.10 Interim Part Numbers - The requirements for interim part number identification
are as defined in the Boeing - Long Beach Division Drafting Manual. Interim part
numbers and methods of identification are listed as follows:
1.10.1 Interim part number suffixes are: ”Engineering Development Unit” (EDU),
”Pre-Production Unit” (PPU), and ”Flight Test Unit” (FTU). The Long Beach Division
Drafting Manual defines the parameters for when to use these interim part number
suffixes.
DPS 3.02
Rev. “BL”
Page 4 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
1.10.2 Interim part number suffixes are used on LRU components. An LRU is a
component which can be replaced by line personnel without any configuration
alterations (i.e., no drilling, reaming, cutting, filing, shimming, etc.). Examples of LRU’s
include, but are not limited to: Electronic boxes (with or without software), actuators,
valves, motors, sensors, switches, transducers, control panels, etc.
1.10.3 Interim parts and their special part number identification are not applicable to
parts that are primary structure (i.e., Principal Structural Elements (PSE’s), fuselage,
wing, empennage, pylon, landing gear, etc.) or secondary structure (i.e., interior, radio
racks, electrical power center, flight surfaces, cargo handling systems, doors, ducts,
etc.).
1.10.4 Use of interim part number suffixes must be approved on Vendor Information
Request (VIR) and authorizing Purchase Order (PO) or Purchase Order Change
Authorization (POCA). These suffixes are only required for parts being delivered to the
Long Beach Division. (LBD).
NOTE: These suffixes are a LBD interim identification only, controlled by a
LBD drawing and do not deviate or require a supplier drawing change.
1.10.4.1 Engineering Development Unit (EDU) - A blue identification label shall be
used.
1.10.4.2 Pre-Production Unit (PPU) - A yellow identification label shall be used.
1.10.4.3 Flight Test Unit (FTU) - A red identification label shall be used.
1.10.5 EDU, PPU and FTU interim-identified parts must be replaced with a
production part or be reidentified with a production part number prior to obtaining a
Certificate of Airworthiness.
NOTE: EDU’s can not be reidentified and must be replaced.
1.10.6 The method of identifying interim part number suffixes, unless otherwise
specified on a VIR (as referenced in paragraph 1.10.8 ”NOTE”), shall be as follows: A
temporary label shall be affixed over the production part number and shall completely
cover/obscure the part number.
1.10.7 The label will be of the appropriate background color, EDU - Blue,
PPU - Yellow and FTU - Red, with black lettering.
1.10.8 The temporary label material and method of attaching it shall be such that it
will remain firmly affixed throughout handling, installation and testing. Clear mylar tape,
such as DPM 895, may be placed over the label to enhance its fluid and abrasion
resistance.
NOTE: Special ID instructions may be required due to environmental
exposure of the part (i.e., heat, oil, water, rubber and movable parts.). These
instructions shall be documented and approved on the VIR.
DPS 3.02
Rev. “BL”
Page 5 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
1.10.9 The label shall be removable without marring the ID of the part. It shall
contain the complete part number, appropriate suffix and serial number (when
applicable). Example: LBD or Supplier Part Number (FTU condition shown).
SN - XYZ
XXXXXXX - XXX FTU
Label with appropriate background color
(blue, yellow or red)
Suffix (EDU, PPU or FTU)
LBD or Supplier part number with dash & dash
numbers (as applicable) with black lettering
Serial number (when applicable)
1.10.10 When a supplier end item deliverable part, subassembly, assembly
(Engineering or Planning) that contains a detail with an interim part number suffix, the
end item delivered to LBD must be identified with ”IP (Interim Part) and Planning
Designated number” as call for on the Planning Form 33-68, PO or POCA.
NOTE: When interim parts are shipped in a kit, the kit number must also carry
the ”IP and Planning Designated number” identification.
Example: Part ––––––––––– Sub Assembly –––––––––––– Assembly ––––––––––––––– Kit
XXXX-1 ”FTU” XXX-501 ”IP3” XXXX-901 ”IP3” XXXX-903 ”IP3”
Required per VIR Required when
end item
Required on
end item
Only required when
end item is
shipped within a kit
1.10.11 Removal or Reidentification - Detail parts identified with an interim part
number suffix will be removed or reidentified with the release of a ”Production Assist”
drawing along with released planning AAO instructions for LBD in house parts and VIR,
PO, RPO or POCA at the supplier (when applicable).
1.10.12 Testing of Parts (Interim, Production and Nonproduction) at Supplier’s
Facility or Subtier
1.10.12.1 Supplier must identify any part that is used for test with a unique
identification as to not allow them to be commingled with other production parts.
NOTE: These parts do not require the use of LBD prefixes or suffixes if they
are not being delivered to LBD.
1.10.12.2 The supplier must have a documented process for the handling and use
of this unique identification.
DPS 3.02
Rev. “BL”
Page 6 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
1.10.12.3 The supplier shall submit any tested part along with all test documents to
LBD MRB Engineering and Supplier Quality prior to reentering the part into the
production system.
1.11 To improve understanding of the requirements of this DPS, certain terms are
defined as follows:
1.11.1 Part - One piece, or two or more pieces joined together which are not
normally subject to disassembly without destruction. Exceptions are assemblies
containing Long Beach Division numbered parts which may be subject to change
activity independent of the next assembly drawing and/or purchase parts.
1.11.2 Subassembly - Two or more parts which form a portion of an assembly or a
unit replaceable as a whole, but having a part or parts which are individually
replaceable.
1.11.3 Assembly - A number of parts or subassemblies or any combination thereof
joined together to perform a specific function.
1.11.4 Engineering Assembly - An Engineering assembly is built exactly to an
Engineering assembly drawing.
1.11.5 Planning Assembly - A planning assembly is not built exactly to an
Engineering assembly drawing.
1.11.6 Planning Edition Number - A sequential change number assigned by
Production Planning to an assembly which identifies that a physical change caused by
either Engineering or Production Planning has been made affecting fit, form, or
function.
1.11.7 Unit - An assembly or any combination of parts, subassemblies and
assemblies mounted together, normally capable of independent operation in a variety of
situations.
1.11.8 Set - A unit or units and necessary assemblies, subassemblies and parts
connected or associated together to perform an operational function. Also used to
denote a collection of like parts such as a “tool set” or a “set” of tires.
1.11.9 Acceptance Stamp - An inspection stamp of LBD, other Boeing components
or suppliers.
1.11.10 Factory Serial Number (FSN) - A permanent, unique number assigned to
each end item product manufactured by LBD for the purpose of customer and
configuration identification. The FSN is independent of assembly line sequence.
1.11.11 Serial Version Number Control (SVNC) - A practice used in lieu of Factory
Serial Number Control to manage traceability and accountability requirements for
nonconfigurated assemblies. SVNC uses the supplier’s serial number in conjunction
with a version number.
1.11.12 Fuselage Number - The chronological assignment and schedule that an
aircraft is produced in sequence to other aircraft.
1.11.13 Version Number - A 3-digit number assigned by LBD Planning used to
identify physical changes to SVNC assemblies.
DPS 3.02
Rev. “BL”
Page 7 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
2. APPLICABLE DOCUMENTS
DPS 2.900 - Nylon Coatings
DPS 3.021 - Bolt Identification
DPS 3.027 - Identification, Nonproduction Parts
DPS 3.27 - Marking Methods and Materials
DPS 3.27-1 - Marking Methods and Materials, Ink Stamping
DPS 3.27-2 - Marking Methods and Materials, Stenciling
DPS 3.27-3 - Marking Methods and Materials, Metal Impression Stamping
DPS 3.27-4 - Electrochemical Etch-Marking of Metals
DPS 3.27-5 - Marking Methods and Materials, Marking by Vibratory Tool
DPS 3.27-6 - Marking Methods and Materials, Electrical - Resistance Stylus
Marking
DPS 3.27-9 - Marking Methods and Materials, Chemical Etch-Marking of
Metals
DPS 3.301 - Supplier Packaging
DPS 4.025 - Dissimilar Metals Protection
DPS 4.813 - Processing Narrow-Strength-Range Parts
MIL-STD-129 - Marking for Shipment and Storage
MIL-STD-130 - Identification Marking of U.S. Military Property
H4-1 - Cataloging Handbook (MM) Federal Supply Code for
Manufacturers, Name to Code
H4-2 - Cataloging Handbook (MM) Federal Supply Code for
Manufacturers, Code to Name
DPS 3.02
Rev. “BL”
Page 8 of 25
MCDONNELL DOUGLAS CORPORATION - This information is subject
to data rights legends on title page or first page.
3. MATERIALS & SPECIAL EQUIPMENT
3.1 The materials and special equipment necessary to perform the required
operations of this DPS are listed in this section. The process materials and special
equipment have been categorized as Mandatory or Substitutable. The category of
Substitutable applies to Suppliers [Subcontractors, Vendors, and Long Beach
Division (LBD) Components].
MATERIALS & SPECIAL EQUIPMENT - MANDATORY
The use of LBD approved manufacturers’ products and special equipment listed in this section, and
referenced within the DPS, is mandatory.
When a government or industry specification is shown and a manufacturer’s product is listed, that product
(or a LBD approved alternative product) is mandatory. A DPM material having an approved alternative
product(s) is so noted with the Footnote (1).
When a government or industry specification is shown and no manufacturer’s product is listed, the
required material is one that is listed on the material specification QPL or one that meets the specification
requirements, if no QPL exists.
Requests for substitution of mandatory materials or special equipment shall be submitted to LBD for
M&PE approval. The deviation request shall be prepared by the Supplier in the form of a change to the
existing DPS using a Serial Process Engineering Order (SPEO), Form 25-1710.
DPM
NUMBER
MATERIAL NAME &
MANUFACTURER’S
DESIGNATION MANUFACTURER’S NAME
SPECIFICATION
NUMBER
5404-9324 Coating, Solvent Removable,
Red, 576-NFA
Aztec Chemical Co.
El Monte, CA
-
- Coating, Epoxy Topcoat,
Fluid Resistant; Gloss,
Comp. A or C, DN 2150
- DMS 2433
MATERIALS & SPECIAL EQUIPMENT - SUBSTITUTABLE
Materials and special equipment listed in this section are used at LBD. Suppliers may use these materials
and special equipment or substitute materials and special equipment which are functionally equivalent
or superior. The substitute material or special equipment shall not degrade the process, part, or
assembly, or material properties.
The specific substitutions shall be recorded in Supplier planning or process documentation.
DPM
NUMBER
MATERIAL NAME &
MANUFACTURER’S
DESIGNATION MANUFACTURER’S NAME
SPECIFICATION
NUMBER
895 Tape, Adhesive, Mylar,
Transparent
- L-T-100, Type 1
[The numbers assigned to Douglas Process Materials (DPM’s) are for internal company use. DPM’s are
QPL’s for LBD approved alternative products or sources.]
FOOTNOTE: (1) Contact LBD buyer for LBD approved alternate products or sources that are listed in
the Douglas Process Material (DPM) Index for LBD use.
DPS 3.02
Rev. “BL”
Page 9 of 25
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to data rights legends on title page or first page.
4. REQUIREMENTS
4.1 Parts and Assemblies - All parts, subassemblies and assemblies as specified
on the purchase order or Long Beach Division inplant build paper shall be identified by
methods specified herein and as follows:
4.1.1 Part Identification (see definition in paragraph 1.10) - The part number and
the change letter of the latest EO affecting the part, or (N/C) where no change letter
exists, shall be applied. The change letter shall be separated from the part number by a
minimum distance of two times the distance between the spacing in the part number.
NOTES: (1) If the assembly EO does not affect the part, no revision letter
change is to be made.
(2) Parts identified as “NC” change will be considered equivalent to
“N/C” unless otherwise proved by an Engineering Order. The
designation of N/C for drawings with no change letter was
established in Revision “BH’ change of this DPS in March of
1999. If in doubt as to what the most recent letter change is,
contact M&PE.
EXCEPTIONS: Identification is not required for:
(1) Details of a weld assembly that cannot be removed from the completed
assembly. The weld assembly is considered to be one part.
(2) Bulk materials cut to fit at time of assembly (make and use) and not
normally replaceable after installation in the assembly.
(3) Parts and inseparable assemblies (including make and use) after
installation in an assembly not normally subject to disassembly or repair.
4.1.1.1 Example of Detail Part Identification and Markings - When size of part
permits, part identification shall be applied as follows:
Part Number
Change Letter(s)
5623478-23 AC
4.1.1.2 Reidentification of Reworked Parts - When a part has been reworked with
an Engineering requirement for reidentification to a new production dash number,
reidentification shall be accomplished by striking the dash number and change letter
and affixing the new dash number and, if applicable, the new change letter just to the
right of it as shown in the following examples:
1234567–3 B –7 or 1234567–3 B–7 C
NOTE: Rework accomplished on detail parts permanently assembled does
not require reidentification of the detail part (unless permanent identification
of that detail is specifically required by Engineering drawing).
DPS 3.02
Rev. “BL”
Page 10 of 25
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to data rights legends on title page or first page.
4.1.1.2.1 Rework Drawing - Where a part has been reworked to a rework drawing,
the letter “R” and the rework drawing number shall be affixed directly above the existing
part number as shown in the following example:
R7654321
1234567-3 B
4.1.1.2.2 Serial EO (Applicable Drawing) - Where a part has been reworked to a
Serial EO issued on the applicable drawing, the part need not be identified with the
Serial EO number, except when coordinated salvage action is required at next
assembly or when specifically directed by the Serial EO. When reidentification is
required, the letter “S” and the Serial EO number shall be applied directly above the
existing part number as shown in the following example:
Existing Part Number Drawing EO Revised Identification
1234567-3 B 1234567 “SEO 001” S001
1234567-3 B
NOTES: (1) Major subcontractors, assigned a source code letter for
issuance of Serial Engineering Orders, shall apply their
assigned code letter between the “S” and the Serial EO
number.
EXAMPLE: “SD601” indicates Serial EO #601 issued by Boeing - Toronto
(formerly MDCAN).
(2) When a SEO No. includes a dash number, it shall appear on
the revised identification. (S001-1 over the existing part
number).
4.1.1.2.3 Serial EO (Assembly Drawing) - Where a part has been reworked to a
Serial EO issued on an assembly drawing, the assembly drawing number followed by
the letter “S” and the Serial EO number shall be affixed directly above the existing part
number as shown in the following example:
Existing Part Number Drawing EO Revised Identification
1234567-3 B 5910007“SEO 001” 5910007 S001
1234567-3 B
NOTES: (1) Major subcontractors, assigned a source code letter for
issuance of Serial Engineering Orders, shall apply their
assigned code letter between the “S” and the Serial EO
number.
EXAMPLE: “SD601” indicates Serial EO #601 issued by Boeing - Toronto.
(2) When a SEO No. includes a dash number, it shall appear on
the revised identification. (5910007 S001-1 over the existing
part number).
DPS 3.02
Rev. “BL”
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to data rights legends on title page or first page.
4.1.1.2.4 Change Letter EO (Applicable Drawing) - Where a part is reworked to a
change letter EO issued on the applicable drawing, reidentification shall be
accomplished by striking the change letter and affixing the new change letter directly
above it as shown in the following example:
Existing Part Number Drawing EO Revised Identification
1234567-3 B 1234567 EO “C” 1234567–3 B
C
4.1.1.2.5 Change Letter EO (Assembly Drawing) - When existing parts are
reworked to a change letter EO issued on an assembly drawing, the letter “R”, the
assembly drawing number and the EO change letter shall be affixed immediately above
the existing part number as shown in the following example:
Existing Part Number Drawing EO Revised Identification
R5910007 J
1234567-3 B 5910007 “J” 1234567-3 B
4.1.1.2.6 Variation Drawing (VD) - When existing parts are reworked to a variation
drawing, the variation drawing number and the change letter or N/C as applicable shall
be affixed directly above the existing part/assembly number as shown in the following
example:
Production
Part Number
Variation Drawing
Part Number Revised Identification
ABC2468-501C VDA1234-3 N/C VDA1234-3 N/C
ABC2468-501 C
4.1.1.3 Interchangeable Parts - All parts identified as ’Interchangeable’ as called out
by the Engineering drawing shall be marked ”Interchangeable Item - Do Not Alter” after
completion, per paragraph 4.8, using a character size of 1/8 inch or larger. When
painting or priming is specified for an interchangeable part prior to shipment, the stamp
shall be applied after paint.
4.1.2 Subassembly or Assembly Identification (See Definitions in Paragraph 1.11) -
An assembly Identification Stamp (see example) that includes the following information
shall be applied to assemblies which are not Serial-Version Number Controlled (SVNC).
See paragraph 4.1.3 for SVNC identification requirements.
4.1.2.1 Assembly Number:
(a) Engineering Assembly - Assembly drawing number and change letter
or (N/C) where no change letter exists.
(b) Planning Assembly - A Planning assigned number. Examples are as
illustrated in paragraphs 4.1.2.1.1, 4.1.2.1.2, and 4.1.2.1.3.
DPS 3.02
Rev. “BL”
Page 12 of 25
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to data rights legends on title page or first page.
4.1.2.1.1 A drawing number segment and a planning assigned dash number
segment:
Drawing Number Dash Number
Planning Assembly
Segment
Segment
Number
1234567 -401 1234567-401
4.1.2.1.2 An assembly number segment and a variation number segment:
Drawing Number Dash Number
Planning Assembly
Segment
Segment
Number
(TwinJet) 1234567-401 V-2 1234567-401V-2
(MD-11) BN12-408 V-2 BN12-408V-2
NOTE: Variation numbers are to be included as part of the assembly
identification, when applicable.
4.1.2.1.3 An assembly number segment and a Planning assigned edition number
segment.
NOTE: Different Boeing components may identify details or assemblies
with edition numbers in different ways, as long as they are consistent with
their internal planning procedures. The following are some examples.
Engineering Edition
Boeing
Assembly Number
Number Assembly Number
Component
1234567-12 AC 3 1234567-12 3AC LBD
1234567-12 AC 3 1234567-12 AC-3 MDCAN
Planning Synthetic Edition
Boeing
Assembly Number
Number Assembly Number
Component
1234567-401 003 1234567-401 003 MDA-West, HB
4.1.2.2 Planning Edition Number (ED. No.) - Not required if identified with factory
serial number (FSN).
4.1.2.3 Factory Serial Number (FSN) - If production planning paper is so identified
and controlled.
4.1.2.4 Example of Approved Assembly Identification Stamp
ASSEMBLY NO. ED. NO.
FSN PROD. INSP.
NOTE: The stamp shape depicted in this example is dimensionless. The
spacing may be changed as necessary.
DPS 3.02
Rev. “BL”
Page 13 of 25
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to data rights legends on title page or first page.
4.1.3 Serial-Version Number Controlled (SVNC) Assembly Identification - A
Serial-Version Identification Stamp (see example in paragraph 4.1.3.6) that includes the
following information shall be applied:
4.1.3.1 Assembly Number - Same as paragraph 4.1.2.1.
4.1.3.2 Manufacturers Serial Number - An alpha-numeric identifier shall be used to
indicate sequence of manufacture at a source.
4.1.3.3 Version Number - A 3-digit number assigned by LBD Planning shall be used
to identify physical changes to SVNC assemblies.
4.1.3.4 Supplier Inspection - Inspection stamp shall be applied by the manufacturer
of the assembly.
4.1.3.5 Source/LBD Inspection - Acceptance stamp shall be applied by Source
Inspection or delegated Quality Assurance representative.
4.1.3.6 Example of Approved Serial-Version Controlled Identification Stamp
Assembly No.
Mfr. Serial No.
Version No.
Supplier Inspect
Source / LBD Insp.
NOTE: The stamp shape depicted in this example is dimensionless. The
spacing may be changed as necessary.
4.1.3.7 Assemblies with serial version number identification shall not have a factory
serial number or fuselage number on any part of the assembly identification placard or
nameplate.
4.1.4 When size or shape of marking area precludes use of the Assembly
Identification Stamp, omit the stamp but the required markings shall be applied to the
assembly.
4.1.5 Supplier requirement for use of the Assembly Identification Stamp is limited to
Long Beach Division design purchased assemblies.
4.1.6 Subcontractors may use their own planning configuration control
identification, in lieu of the Long Beach Division edition number, for assemblies which
have aircraft factory serial number identity or those same assemblies built as spares.
4.1.7 Assemblies to be shipped as spares shall also be identified with the change
letter or (N/C) where no change letter exists. The change letter shall be separated from
the assembly number by a minimum of 1/8 inch.
4.2 On purchase, manufacture, and on issue from any stockroom, the following
parts or assemblies do not require individual identification but shall be identified by
tagging or marking each package: (For supplier packaging requirements, refer to
DPS 3.301)
4.2.1 Items where a complete part number cannot be applied directly to a surface of
the part or assembly.
DPS 3.02
Rev. “BL”
Page 14 of 25
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to data rights legends on title page or first page.
4.2.2 Items that are mass produced (any size), such as screws, nuts, bolts,
washers, clips, and shims.
4.2.3 Items that are exempt from individual identification do not require a part
number when installed in an assembly.
4.3 When a suitable marking area of a part is too small to accommodate (a), (b),
and (c) as defined below, identify the part by tagging with all the applicable information
as in paragraph 1.2. If the part marking area can accommodate (a), (b) and (c) but
cannot fit (d) through (m) as required, the parts shall be identified with as many of the
applicable markings as possible and in the following order of importance. The
remainder of the markings shall be placed on an attaching tag as in paragraph 1.2.
(a) Part Number and Change Letter (or N/C)
(b) Planning Edition Number or Version Number (for subassemblies and
assemblies only)
(c) Acceptance Stamp and Date
(d) Proof Load
(e) Heat Treat Identification*
(f) Hardness*
(g) Magnaflux*
(h) Fluorescent Penetrant*
(i) X-Ray*
(j) Ultrasonic*
(k) Baked (Embrittlement Relief)*
(l) Passivate*
(m) Electropolish*
*Stamps that have been obliterated by operations such as plating, painting,
etc., need not be reapplied but may be verified by an acceptance stamp and
date.
4.4 All marking shall be clearly legible.
4.5 Characters which are at least 1/16 inch high shall be used on the surface of a
part or assembly. Space permitting, always use characters large enough to be easily
observed on the part or assembly. Normally, rubber stamp characters are 3/16 inch
high or larger.
4.6 Markings shall be located on detail parts and assemblies so they will be visible
after assembly and installation, when practical.
4.6.1 If an after installation operation (i.e., painting) hides or obliterates the detail
part or assembly marking, or if the installation operation itself renders the identification
to be no longer visible; reidentification of the detail part or assembly marking is not
required unless permanent identification is specifically required by the Engineering
drawing.
DPS 3.02
Rev. “BL”
Page 15 of 25
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to data rights legends on title page or first page.
4.6.2 Marking of aluminum-lithium detail parts shall be accomplished per
DPS 3.27-1 after completion of surface treatment and paint operations with the symbol
“AL-Li.” The marking shall be 3/8 inch high or larger and be located as close to the part
number as legibly feasible. All Fabrication Orders (FO) shall be identified with the
“AL-Li” symbol.
4.7 Identification markings shall be applied directly onto the surface of the part or
assembly providing sufficient and suitable surface area is available. The following shall
not be marked:
4.7.1 Any surface which will ultimately be exposed as an exterior skin surface or as
an interior appearance surface in the passenger or crew compartment.
4.7.2 A surface which is precision machined or polished.
4.7.3 Any surface which has been dry film lubricated.
4.8 Part numbers, change letters, and other markings shall be applied on the
surfaces of parts and assemblies by the method specified on the Engineering drawing
or by ink stamping per DPS 3.27-1 subject to ink stamping restrictions per
paragraph 4.18. In lieu of ink stamping on metallic surfaces, it is acceptable to stencil
per DPS 3.27-2 and coat per DPS 2.900, Type 2 or 4.Where ink stamping is prohibited,
use another dash numbered marking method of DPS 3.27 subject to the restrictions of
paragraph 4.18 through paragraph 4.21.
4.8.1 When parts call for Trim-On-Assembly (TOA), part number identification shall
be located within the final trimmed part.
4.9 Permanent Identification - When the Engineering drawing specifies “permanent
identification” and the area for identification is shown, a character size of 1/8 inch or
larger shall be used and the identification shall be applied per the following method:
4.9.1 Electrochemical deep etch, per DPS 3.27-4, the part number, including its
dash number and other drawing identification, except the change letter or (N/C).
Identify with the detail part number unless the drawing specifically states: “Permanently
Identify Assembly Per DPS 3.02.”
4.9.2 Ink stamp per DPS 3.27-1, the change letter or (N/C).
NOTE: When permanently identified parts require reidentification as in
paragraph 4.1.1.2, the electrochemical etch method shall not be used to “X”
out the previous identification. Remove mechanically per the Engineering
drawing specified fabrication DPS.
4.10 When identifying a machined casting or forging, the raised number that
identified the raw casting or forging need not be ground off unless specified by the
Engineering drawing.
4.11 When Engineering drawings, applicable to Military aircraft and/or related
equipment, require a nameplate or specify “Activity Code Identification Required,” the
assigned code number of the Design Activity shall be included. In addition, whenever
the item is to be manufactured at other than the Design Activity, the assigned Code
Number of the Manufacturing Activity, or manufacturer’s name, or manufacturer’s
registered trademark shall be incorporated by that manufacturer.
DPS 3.02
Rev. “BL”
Page 16 of 25
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to data rights legends on title page or first page.
4.11.1 Code Number Assignment - Refer to Military Cataloging Handbooks H4-1
and H4-2, Federal Supply Code for Manufacturers for assignment of code numbers,
such as:
Company Name Code Number
Boeing - Long Beach Division 88277
4.11.2 Application of Codes - The following examples are intended only to indicate
the relationship of the required code numbers and notations to the part number. The
examples do not authorize deletion of other requirements specified in this DPS.
4.11.2.1 Parts
Design Activity Code Number and a Dash (–)
Part Number
Change Letter(s)
XXXXX–1234567–12 AC
MFR XXXXX
The notation “MFR” and the manufacturer’s code number, or
manufacturer’s name, or registered trademark when
manufactured at other than the Design activity.
4.11.2.2 Assemblies Without Nameplates
Design Activity Code Number and the Notation “ASSY”
Assembly Number
Change Letter(s)
XXXXXASSY–1234567–501 AC
MFR XXXXX
The notation “MFR” and the manufacturer’s code number, or
manufacturer’s name, or registered trademark when
manufactured at other than the Design activity.
DPS 3.02
Rev. “BL”
Page 17 of 25
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4.11.2.3 Nameplate Assemblies - Include the code numbers in the appropriate
blocks of the nameplate:
Design Activity Code Number and a Dash (–)
Assembly Number
Change Letter(s)
XXXXX–1234567–501 AC
MFR XXXXX
Manufacturer’s code number, or manufacturer’s name,
or registered trademark when manufactured
at other than the Design activity.
PART NO.
NOTES: (1) Identification and modification (AN7510) plates do not provide
a block for the manufacturer’s code number. Include the
manufacturer’s code number on the bottom of the plate:
MFR XXXXX
The notation “MFR” and the manufacturer’s code number, or
manufacturer’s name, or registered trademark.
(2) A planning-400 series number is not to be used in lieu of the
Engineering number when the Engineering drawing specifies
the use of nameplates and serial identification.
4.12 Parts and Assemblies Purchased to Long Beach Division Specification Control
or Source Control Drawings - They shall be identified to the requirements of the
applicable control drawings and any special requirements noted on the purchase order.
A marking method shall be used that will provide legible marks as permanent as the
normal life expectancy of the item marked without adverse effect on its life and utility.
DPS 3.02
Rev. “BL”
Page 18 of 25
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4.13 Parts and Assemblies Purchased by Supplier’s Part Number, Industry
Standards Drawings or LBD’s Standards Drawings
4.13.1 Supplier’s Part Number or Industry’s Standards Drawing (e.g., AN, NAS, MS)
- The end article shall be identified with the applicable part number that is specified on
the LBD purchase order and a supplier serial number, if applicable. A marking method
shall be used that will provide a legible mark that is as permanent as the normal life
expectancy of the item marked, without any adverse effects on its life and utility. Parts
and assemblies that do not have sufficient and suitable surface to mark must be
adequately identified on attached tags or on unit containers that are used for packaging
(see paragraphs 4.2 and 4.3)
4.13.2 LBD’s Standards Drawings - There are different identification requirements
for each type of LBD Standard drawing and these requirements are in the following
subparagraphs. The marking method used to identify the item shall provide a legible
mark that is as permanent as the normal life expectancy of the item marked, without
any adverse effects on its life and utility. The LBD Standard drawing number shall be
specified on the LBD purchase order.
4.13.2.1 Type “S” - Type “S” series Standard drawing numbers are characterized by
Sxxxxxxx. These items shall be individually identified with the LBD Standard drawing
part number per the requirements of the applicable LBD Standard drawing. If space is
limited on the item, identify per the requirements of paragraphs 4.2 and 4.3. Revision or
change letter(s) to the LBD Standard is not required to be applied, unless otherwise
specified on the LBD Standard drawing. Other markings shall be applied as required
by the applicable material specification (i.e., DMS, MIL-SPEC, AMS, etc.).
4.13.2.2 Type “D” - Type “D” series Standard drawing numbers are characterized by
xDxxxx.
4.13.2.2.1 Items that are vendor designed with an approved vendor’s part
designation listed on the LBD Standard drawing source sheet shall be identified as
follows:
(a) The item shall be individually identified with the approved vendor’s
part designation and the CAGE or FSCM per MIL-STD-130.
Company name or logo is acceptable in lieu of the CAGE or FSCM
identification. If space is limited on the item, identify per the
requirements of paragraph 4.2. Apply logo to item if possible.
(b) The “D” series approved number and the approved vendor’s part
designation shall be applied to the items unit package and the
shipping container per MIL-STD-129. Revision letter(s) to the LBD
Standard drawing is not required as part of the marking, unless
otherwise specified on the LBD Standard drawing.
NOTE: The approved vendor’s part designation, CAGE or FSCM, name
or logo, and the “D” - series approved number callout are listed on the last
sheet of the applicable LBD Standard drawing (i.e., source sheet).
4.13.2.2.2 Items that are designed by LBD and have approved vendor’s part
designation listed on the LBD Standard drawing source sheet shall be identified per
paragraph 4.13.2.2.1.
DPS 3.02
Rev. “BL”
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4.13.2.2.3 Items that are designed by LBD and have no approved vendor’s part
designation listed on the LBD Standards drawing source sheet shall be identified as
follows:
(a) The item shall be individually marked with the “D” series approved
number per MIL-STD-130. If space is limited on the item, identify per
the requirements of paragraph 4.2.
(b) The “D” series approved number shall be applied to the items unit
package and the shipping container per MIL-STD-129. Revision
letter(s) to the LBD Standards drawing are not required as part of the
marking, unless otherwise specified on the LBD Standard drawing.
NOTE: The “D” series approved number callout is listed on the last sheet
of the applicable LBD Standards drawing (i.e., source sheet).
4.14 Identification of Castings (Die, Sand, Permanent Mold and Investment)
4.14.1 Identification of Machined Complete Castings - Castings shall be identified in
raised letters unless otherwise specified on drawing. When foundry casting method
prevents use of raised letters, ink stamping per DPS 3.27-1 may be substituted unless
otherwise specified on the Engineering drawing. Castings which are too small to be
identified on the part surface shall be individually bagged and tagged per paragraph
4.3. The change letter may be ink stamped even when identification by raised letters is
specified (see limitation of paragraph 4.18.5). Other markings shall be applied as
required by the Engineering drawing or applicable DMS or DPS. Identification shall be
located in area specified on Engineering drawing or, when not specified, it shall be
located in an area of no machining according to best pattern practice and must consist
of the following:
4.14.1.1 The part number, as indicated on drawing.
4.14.1.2 The Engineering drawing change letter that affects the casting blank (or
“N/C” where no change exists).
4.14.1.3 The cavity number. Where part identification is by ink stamping, the cavity
number is not required except for first article inspection.
EXAMPLE: 5713457-1 D 1
Part Number Eng. Change Ltr. Cavity #
DPS 3.02
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4.14.2 Identification of Castings Prior to Machining - Identify to the applicable
material specification. (i.e. DMS, MIL-SPEC, AMS, etc.), for identification requirements
using the methods specified in paragraph 4.14.1
NOTE: Identify the lot numbers specifically (Lot #______) in order to avoid
confusion with other identification markings.
4.15 Identification of Rough Forgings - For machined complete forgings, parts shall
be identified as specified on the Engineering drawing. When not specified, either
embossing or ink stamp shall be used. Forgings which are too small to be identified on
the part surface shall be individually bagged and tagged per paragraph 4.3. The
change letter may be ink stamped even when identification by embossing is specified
(see limitation of paragraph 4.18.5). The part number shall be located as specified on
the Engineering drawing. When not specified, location is optional. Identification content
shall consist of the part number as indicated on the Engineering drawing, and the
change letter that affects the forging blank or “N/C” where no change letter exists shall
be specified. Other markings shall be applied as required by the Engineering drawing
or applicable DMS or DPS.
NOTE: For identification of forgings prior to machining, identify per the
applicable material specification (i.e. DMS, MIL-SPEC, AMS, etc.) using
the identification methods specified herein. Identify the lot number
specifically (Lot #________) in order to avoid confusion with other
identification.
4.16 When the Engineering drawing or procurement specification specifies a
nameplate and/or source coding or serialization the source code and serial numbers
shall be applied as follows:
4.16.1 Definitions
4.16.1.1 Source Code - A five-digit numeric identifier established in Cataloging
Handbook H4-1 and H4-2, Federal Supply Code for Manufacturers, assigned to
establishments which are manufacturers or have design control of items of supply
procured by agencies of the federal government, used by Long Beach Division (LBD) to
indicate the source of manufacture.
NOTE: When a supplier has not been assigned an FSCM, LBD shall assign
a five-digit alphanumeric number (DXXXX) for use as a source code until
such time as an FSCM is assigned. Examples of an FSCM code is:
88277 - Long Beach Division
DPS 3.02
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4.16.1.2 Serial Number - A one or more digit numeral to indicate sequence of
manufacture at a source:
4.16.1.2.1 The first end item manufactured by a source, whether basic part number
or dash number, must be assigned the serial number “1”.
4.16.1.2.2 Subsequent end items must be numbered consecutively even though the
dash number changes. End items reworked to new dash numbers shall retain the
original serial number. However, new dash numbered end items must be listed on a
new page of the serial number permanent record.
4.16.1.2.3 Once assigned, a serial number must not be changed or duplicated even
though the end item is lost or scrapped, however:
4.16.1.2.3.1 A destroyed or obliterated name plate must be replaced with a new
name plate using the identical serial number. The original manufacturer must furnish
the duplicate name plate or authorize the fabrication of the replacement.
4.16.1.2.3.2 When serialized and recorded end items are reworked into new basic
part number configurations, a new serial number series must be assigned. The old
serial number permanent record must be revised to reflect change to new serial
numbers.
4.16.2 Application Methods - The choice of application methods of the source
code-serial numbers to the nameplate depends on time of application as follows:
4.16.2.1 Before Nameplate Installation - The information shall be applied by
impression stamping, engraving or electrochemical etching.
4.16.2.2 After Nameplate Installation - The information shall be engraved or
electrochemical etched (do not impression stamp).
NOTE: The source code may be a part of the nameplate design (as
manufactured, such as colored anodic or etched.
4.16.2.3 Maintain a permanent record of serial numbers in conjunction with their
use shall be maintained.
4.17 Special Spare Parts or Assembly Requirements - When the part number
specified on the purchase order or Boeing - Long Beach Division inplant build paper
includes special code letters, part number identification of spare parts, subassemblies,
and assemblies must include these letters as an integral part of the number or dash
number. The spacing between the code letters and the part number shall be no greater
than the distance between the individual numerals of the part number to prevent
confusion with Engineering change letters. The use of these specific codes in no way
changes the requirement for the use of Engineering change letters. No codes other
than those specified in the subsequent paragraphs shall be used in this manner.
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4.17.1 Code Letter “N” - The letter “N” appearing immediately after the last digit of a
part number signifies that the part is ordered, manufactured, and sold in a “Noted”
condition representing a variation from drawing requirements until all current supply is
exhausted. Future deviations from drawing requirements for undrilled parts (a part with
pilot holes omitted at the attaching fastener locations) will be identified as follows:
EXAMPLE:
Production Part
to be Replaced
Former ”Noted” Spare
Part to be Replaced
Spare Part Identical to
Production or ”Noted” Part
except without Pilot Holes
ARB7732-115 ARB7732-115N ARB7732U115
5912188-41 5912188-41N 5912188U41
9954664-12 9954664-12N 9954664U12
NOTE: Spare and retrofit parts designed and manufactured by Boeing without pilot
holes will be identified by use of a (U) in place of the dash (-) in the dash number
portion of a Boeing production part number. ”U” designates an undrilled spare part
(a part with pilot holes omitted at the attaching fastener locations). Other deviations
from drawing requirements [the addition of ”trim on assembly” (TOA) material, inclusion
of bag and tie items, etc.] will also be supplied until current supply is exhausted. Future
procurement of parts requiring a deviation (other than undrilled parts) from the
Engineering drawing will be covered under a new drawing number
(SK or SS ref: Drafting Manual Section F, Page F-5.4), which will eliminate the need for
parts identified as ”noted condition” parts.
4.17.2 Code Letters “SP” - The code letters “SP” appearing immediately after the
last digit of a part number shall signify a customer’s specification item which includes
detail finish specification requirements on materials, finishes, colors, etc.
4.18 Identification by the ink stamping method per DPS 3.27-1 is prohibited on:
4.18.1 Surfaces of parts and assemblies that, in service, will be in direct contact
with liquid or gaseous oxygen.
4.18.2 Surfaces subject to high temperatures which would destroy ink marks where
permanent markings are required.
4.18.3 Surfaces subject to contact with fluids which would dissolve or otherwise
destroy ink marks where permanent markings are required.
4.18.4 Surfaces which would be damaged by the ink or surfaces to which ink will
not adhere.
4.18.5 Surfaces of castings, forgings, or composite parts, where the surface
roughness would impair the legibility.
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to data rights legends on title page or first page.
4.19 In general, identification by metal impression stamping, including use of “Steel
Controlled Stamps,” is forbidden on all Long Beach Division designed aircraft parts and
assemblies, even though specified on the Engineering drawing. Parts shall not be
impression stamped until the following has been evaluated. Where there is any doubt
as to applicability, contact the Metallurgical Group of Materials & Process Engineering
for disposition.
4.19.1 For DC-9 and subsequent commercial aircraft and all Naval aircraft,
impression stamping per DPS 3.27-3 is permitted on the following:
(a) Ballistics deflector plate.
(b) G.F.A.E., proprietary purchased parts, and other parts of supplier design.
(c) Nameplates - before installation.
(d) Control cable terminals - proof load stamp only.
(e) Special bolts per DPS 3.021 or DPS 4.813.
(f) When the Engineering drawing specifically states: “Impression Stamp
Only - No Other Marking Method Permitted” and the area on the part to
be marked is shown on the drawing.
(g) Nonairborne parts, e.g., ground support equipment.
(h) Hand forgings, before machining.
4.19.2 For DC-8 and previous commercial aircraft models and for C-133 and
previous Military aircraft models, impression stamping per DPS 3.27-3 is prohibited on
the following:
4.19.2.1 Notch-sensitive materials, including:
(a) 2XXX and 7XXX alloys in all tempers and in all applications, except
hand forgings before machining.
(b) 1100, 3003, 5052 and 6061 aluminum alloys, when end use is a fluid
tank.
(c) Magnesium alloys.
(d) Case-hardened or nitrided steel.
(e) Steel of specified heat treatment of 180,000 psi tensile strength or
higher.
(f) Titanium alloys.
(g) Plastics (EXCEPTION: Vibratory tool marking is acceptable on
plastics other than acrylics, polysulfone and polycarbonate.)
4.19.2.2 All sheet, strip, or extrusions less than 0.032 inch in thickness.
4.19.2.3 All tubing.
4.19.2.4 Parts and assemblies in engine mount structures.
4.19.2.5 Parts and assemblies after plating or chemical surface treatment
(anodized, etc.)
DPS 3.02
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4.20 Identification by electrochemical etch marking per DPS 3.27-4 and chemical
etch marking per DPS 3.27-9 shall be prohibited on:
4.20.1 Steel heat treated in excess of 200,000 psi, except hydraulic valve lap
assemblies and parts requiring “permanent” identification (see paragraph 4.9).
4.20.2 Metals which will be chemically surface treated, plated or painted, unless
actual trial indicates the marks will be legible after the final finish is applied.
EXCEPTION: Electrochemical deep etch is permitted when the Engineering
drawing specifically states: “Electrochemical Deep Etch Only - No Other
Marking Method Permitted” and the area on the part to be marked is shown
on the drawing.
4.21 Identification by vibratory tool marking per DPS 3.27-5 and electrical
resistance stylus marking per DPS 3.27-6 is prohibited on:
4.21.1 Notch sensitive materials, including:
(a) 2XXX and 7XXX aluminum alloys in all tempers and in all applications.
(b) 1100, 3003, 5052 and 6061 aluminum alloys, when end use is a fluid
tank.
(c) Magnesium alloys.
(d) Case-Hardened or nitrided steel.
(e) Steel of specified heat treatment of 180,000 psi tensile strength or
higher.
(f) Titanium alloys.
(g) Plastics of acrylic, polysulfone and polycarbonate.
(h) Composite materials (organic).
4.21.2 All sheet, strip or extrusions less than 0.032 inches in thickness.
4.21.3 All tubing.
4.21.4 Parts and assemblies in engine mount structures.
4.21.5 Parts and assemblies after plating or chemical surface treatment
(anodized, etc.).
EXCEPTION: Vibratory tool marking is permitted when the Engineering
drawing specifically states: “Vibratory Tool Mark Only - No Other Marking
Method Permitted” and the area on the part to be marked is shown on the
drawing.
5. INSTRUCTIONS/PROCEDURES
This Section not applicable.
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6. QUALITY CONFORMANCE/CONTROL PROVISIONS
6.1 Process Control - Provide surveillance as necessary to determine compliance
with this DPS and other applicable Engineering requirements.
6.2 Quality Control - Verification of compliance to the following may be performed
by Quality Assurance or by the organization doing the work:
6.2.1 All marking is clearly legible.
6.2.2 Identification markings are applied directly onto the surface of the part or
assembly providing sufficient and suitable surface area is available.
6.2.3 Castings are identified in accordance with paragraph 4.10, and 4.14 of this
DPS.
6.2.4 Rough forgings are identified in accordance with paragraph 4.15 of this DPS.
6.2.5 Special spare parts or assemblies are identified with code letters in
accordance with the requirements of paragraph 4.17 of this DPS.
6.3 Nonconformances - Process nonconformances in accordance with standard
practice.
JAH:ah IDENTIFICATION OF PARTS AND ASSEMBLIES 东航河北分公司可靠性月报 [复 IDENTIFICATION OF PARTS AND ASSEMBLIES IDENTIFICATION OF PARTS AND ASSEMBLIES
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