CFM HMU / HPSOV Switch

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February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 1
HMU / HPSOV Switch
CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, February 2002 WTT face to face or Export are Prohibited
HMU - HPSOV Indication System
Background
• HPSOV switch leading cause of HMU removals and D&C’s
- On-wing switch replacement in place for containment
- Committed to operators to intro fix by 4Q’01
• Joint CFMI/Boeing/Honeywell team have studied design
alternatives to increase reliability to acceptable level
- SPST switch with A/C modification selected
• SPST switch eliminates predominant failure mode via run
reed deletion
- “Latch on shutdown” constitutes 90% of removals
- Other switch characteristics maintained as risk abatement
• New HMU P/N (P08) creates one-way engine/aircraft
interchangeability
- SPST switch requires revised P5-2 card; revised card
compatible with current or proposed switch
Qualification Testing Status
• Comprehensive test program completed that addressed
potential field failure modes
• Endurance testing for both run and shutdown modes
• Bounce testing completed at 1.25X engine “g” levels with
Boeing P5-2 card
- No “flickering” light observed.
• Prototype switch installed on development engine for
endurance cycling
- 4000 cycle endurance test with periodic switch monitoring
successfully completed
NC
NO
Arm
NC
NO
Arm
Proposed Switch Configuration
Current Double Throw
Proposed Single Throw
Run contact eliminated
Introduction Logistics
• CFMI/Boeing/Honeywell launch team formed. Charter:
Insure all documentation, hardware, service bulletins are
available for smooth introduction of the revised HPSOV
indication system into production and in-service aircraft
• Introduction points chosen
- P5-2 Circuit card:
- A/C line No 1047 (complete)
- SPST Switch (P08 HMU):
- A/C line No 1077 -- Feb. ‘02 Aircraft delivery
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 3
CFM56-7B HPSOV Field Plan
• Boeing Production
– Introduce new P5-2 panel circuit cards line # 1047 (Complete)
– Introduce new SPST HMU (P08) line # 1077 (Feb 02 Del.)
• Field retrofit of P5-2 circuit cards
– 40 cards per week increasing to 60 per week Apr 2002 (2 cards per aircraft)
– P5-2 Circuit Cards available for entire fleet in approximately 10 months
– Boeing logistics focal identified and will work with CFM/HW
– Customers “No Charge” Purchase Orders will be required
Customer Contacts :
• Bill Swearengin - Boeing Don Thurnquist - CFMi Inc
• Francois Boitelet - CFMi SA Bob Chojnacki - Honeywell
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 4
Interim HMU plan until P5-2 cards attain fleet penetration
• Aircraft must be compatible with new SPST switch
– Aircraft must have new P5-2 circuit
– If new card is not available:
– Convert P08 to P07 (CFMI SB 73-068; HW SB CHT1 - 73-0015)
– In special cases, Boeing can provide a No Technical Objection for limited
operation with the ENG VALVE CLOSED light on provided that proper
operation of the HPSOV is confirmed. The operator will need to coordinate
this with their regulatory agency for approval.
– Shop return HMUs to remain P07 until Aug 2002
– Airlines can elect to note on repair PO to upgrade to P08 (SPST)
– HMU switch kits available “Free Of Charge” for airlines that wish to upgrade
proactively
CFM56-7B HPSOV Field Plan
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 5
Interim HMU plan until P5-2 cards attain fleet penetration
• Honeywell will continue to replace current switches at “No Charge”
– 48 hours notice is required
– Can be accomplished on-wing
– P08 to P07 conversion if required (CFMI SB 73-068; HW SB CHT1
- 73-0015)
CFM56-7B HPSOV Field Plan
OK
OK
OK
Deliver as P08 - specified
by Purchase Order
P5-2 Module -1 or-2 P5-2 Module -3 or -4
P08 on APL line
number >1046
Spare P08
On APL Line
number < 1047
Lease Pool
Remain P07
Spare HMUs
N/A
Prime - HW FSE convert
to P07 (S/B)
Backup - Provide new P5 cards
OK
Deliver as P07 - specified
by Purchase Order
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 6
Retrofit Strategy
• Hardware will be maintained for unscheduled use
– Honeywell will have both switch configurations available
– Boeing will have aircraft cards available at Spares Dist. Center
– Boeing AOG system will support urgent orders
• Spare engines will be delivered with P08 HMUs
– Can be changed to P07 at customer request by Honeywell
• CFMI lease pool engines will remain equipped with P07
– Converted later in the program to allow for flexibility
CFM56-7B HPSOV Field Plan
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 7
Communication Plan
CFMI Fleet Highlights Issued Dec 01
Boeing Fleet Team Digest Article (FTD) update Issued Jan 02
Review Field plan with WTT - Telecon Complete
CFMI All Operator Wire Feb 2002
Boeing Service Letter Feb 2002
Release Boeing P5-2 S/B TBD
Release CFMI SBs Feb 2002
WTT Face To Face 5/6 Feb 2002
CFM56-7B HPSOV Field Plan
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 8
Summary
• P5-2 circuit card will be FOC to customer
• New switches/installation will be FOC to the customer
• Logistics focal point identified and contact information
to be published
• AOG scenarios addressed
• Your CFMI ATPMs and CSMs will be thoroughly
engaged with customer specific field programs
CFM56-7B HPSOV Field Plan
February 2002 WTT face to face CFMI / Boeing Proprietary Information - Unauthorized Disclosure, Use, or Export are Prohibited 9
Service Bulletin Summary
CFM56-7B HPSOV Field Plan
SB Intent Boeing SB CFM SB H/W SB
On-wing sw N/A 73-037R2 CHT1 73-008R2
replacement
On-wing rev K N/A 73-061R1 CHT1 73-011
sw replacement
with wire support
bracket
Rework P5-2 737-28-1179 N/A N/A
233A3202-28-02
Introduce P08 N/A 73-067 CHT1 73-0014
P08 to P07 N/A 73-068 CHT1 73-0015
Conversion

979199501

Arm Proposed Switch Configuration Current Double Throw Proposed Single Throw Run contact eliminated Introduction Logistics • CFMI/Boeing/Honeywell laun

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CFM HMU / HPSOV Switch