Commonly Used Airline Delay & Diversion Codes

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Commonly Used Airline Delay & Diversion Codes
Page 1 of 4 Updated: 04 October 2004
For Notes and Disclaimers, plus a postscript please see page 4 - DIH
Numeric Alphabetic Description
Airline Internal Codes:
00
01
02
03
04
05
IATA has recommended that these codes are used by individual airlines to
develop code definitions that meet their specific requirements: e.g. 03
"Three-class system" moving curtain.
Note At time of writing the IATA Recommendation AHM 730 does NOT
suggest any Alphabetic Equivalents for these codes
Others:
06 OA NO GATE/STAND AVAILABILITY DUE TO OWN AIRLINE ACTIVITY
Schedules
09 SG SCHEDULED GROUND TIME LESS THAN DECLARED MINIMUM
GROUND TIME
Passenger and Baggage
11 PD LATE CHECK-IN, acceptance after deadline
12 PL LATE CHECK-IN, congestion in check-in area
13 PE CHECK-IN ERROR, passenger and baggage
14 PO OVERSALES, booking errors
15 PH BOARDING, discrepancies and paging, missing checked-in passenger
16 PS COMMERCIAL PUBLICITY! PASSENGER CONVENIENCE, VIP, press,
ground meals and missing personal items
17 PC CATERING ORDER, late or incorrect order given to supplier
18 PB BAGGAGE PROCESSING, sorting, etc.
Cargo and Mail
If delays caused by Mail handling can be identified use the Mail specific codes in the next section (27-
29), otherwise use the codes detailed below (21-26).
21 CD DOCUMENTATION, errors, etc
22 CP LATE POSITIONING
23 CC LATE ACCEPTANCE
24 CI INADEQUATE PACKING
25 CO OVERSALES, booking errors
26 CU LATE PREPARATION IN WAREHOUSE
Mail Only
27 CE DOCUMENTATION, PACKING, etc
28 CL LATE POSITIONING
29 CA LATE ACCEPTANCE
Aircraft and Ramp Handling
31 GD AIRCRAFT DOCUMENTATION LATE/INACCURATE, weight and balance,
general declaration, pax manifest, etc.
32 GL LOADING/UNLOADING, bulky, special load, cabin load, lack of loading
staff
33 GE LOADING EQUIPMENT, lack of or breakdown, e.g. container pallet loader,
lack of staff
34 GS SERVICING EQUIPMENT, lack of or breakdown, lack of staff, e.g. steps
35 GC AIRCRAFT CLEANING
36 GF FUELLING/DEFUELLlNG, fuel supplier
37 GB CATERING, late delivery or loading
38 GU ULD, lack of or serviceability
39 GT TECHNICAL EQUIPMENT, lack of or breakdown, lack of staff, e.g. pushback
Commonly Used Airline Delay & Diversion Codes
Page 2 of 4 Updated: 04 October 2004
Numeric Alphabetic Description
Technical and Aircraft Equipment
41 TD AIRCRAFT DEFECTS
42 TM SCHEDULED MAINTENANCE, late release
43 TN NON-SCHEDULED MAINTENANCE, special checks and/or additional
works beyond normal maintenance schedule
44 TS SPARES AND MAINTENANCE EQUIPMENT, lack of or breakdown
45 TA AOG SPARES, to be carried to another station
46 TC AIRCRAFT CHANGE, for technical reasons
47 TL STANDBY AIRCRAFT, lack of planned standby aircraft for technical
reasons
48 TV SCHEDULED CABIN CONFIGURATION VERSION ADJUSTMENTS
Damage to Aircraft
51 DF DAMAGE DURING FLIGHT OPERATIONS, bird or lightning strike,
turbulence, heavy or overweight landing, collision during taxying
52 DG DAMAGE DURING GROUND OPERATIONS, collisions (other than during
taxying), loading/off-loading damage, contamination, towing, extreme
weather conditions
Automated Equipment Failure/EDP (Computer System)
55 ED DEPARTURE CONTROL
56 EC CARGO PREPARATION/DOCUMENTATION
57 EF FLIGHT PLANS
Flight Operations and Crewing
61 FP FP FLIGHT PLAN, late completion or change of, flight documentation
62 FF OPERATIONAL REQUIREMENTS, fuel, load alteration
63 FT LATE CREW BOARDING OR DEPARTURE PROCEDURES, other than
connection and standby (flight deck or entire crew)
64 FS FLIGHT DECK CREW SHORTAGE, sickness, awaiting standby, flight time
limitations, crew meals, valid visa. health documents, etc
65 FR FLIGHT DECK CREW SPECIAL REQUEST, not within operational
requirements
66 FL LATE CABIN CREW BOARDING OR DEPARTURE PROCEDURES, other
than connection and standby
67 FC CABIN CREW SHORTAGE, sickness, awaiting standby, flight time
limitations, crew meals, valid visa, health documents, etc
68 FA CABIN CREW ERROR OR SPECIAL REQUEST, not within operational
requirements
69 FB CAPTAINS REQUEST FOR SECURITY CHECK, extraordinary
Weather
71 WO WEATHER AT DEPARTURE STATION
72 WT WEATHER AT DESTINATION STATION
73 WR WEATHER EN ROUTE OR ALTERNATE
75 WI DE-ICING OF AIRCRAFT, removal of ice and/or snow, frost prevention
excluding unserviceable equipment
76 WS REMOVAL OF SNOW, ICE, WATER AND SAND FROM AIRPORT
77 WG GROUND HANDLING IMPAIRED BY ADVERSE WEATHER CONDITIONS
Commonly Used Airline Delay & Diversion Codes
Page 3 of 4 Updated: 04 October 2004
Numeric Alphabetic Description
Air Traffic Flow Management Restrictions
81 AT ATFM DUE TO ATC EN-ROUTE DEMAND/CAPACITY, standard
demand/capacity problems
82 AX ATFM DUE TO ATC STAFF/ EQUIPMENT EN-ROUTE, reduced capacity
caused by industrial action or staff shortage or equipment failure,
extraordinary demand due to capacity reduction in neighbouring area
83 AE ATFM DUE TO RESTRICTION AT DESTINATION AIRPORT, airport and/or
runway closed due to obstruction, industrial action, staff shortage, political
unrest, noise abatement, night curfew, special flights
84 AW ATFM DUE TO WEATHER AT DESTINATION
Airport and Governmental Authorities
85 AS MANDATORY SECURITY
86 AG IMMIGRATION, CUSTOMS, HEALTH
87 AF AIRPORT FACILITIES, parking stands, ramp congestion, lighting, buildings,
gate limitations, etc
88 AD RESTRICTIONS AT AIRPORT OF DESTINATION, airport and/or runway
closed due to obstruction, industrial action, staff shortage, political unrest,
noise abatement, night curfew, special flights
89 AM RESTRICTIONS AT AIRPORT OF DEPARTURE WITH OR WITHOUT
ATFM RESTRICTIONS, including Air Traffic Services, start-up and
pushback, airport and/or runway closed due to obstruction or weather
(restriction due to weather in case of AFTM regulation only, else refer to
code 71 (WO», industrial action, staff shortage, political unrest, noise
abatement, night curfew, special flights
Reactionary
91 RL LOAD CONNECTION, awaiting load from another flight
92 RT THROUGH CHECK-IN ERROR, passenger and baggage
93 RA AIRCRAFT ROTATION, late arrival of aircraft from another flight or previous
sector
94 RS CABIN CREW ROTATION, awaiting cabin crew from another flight
95 RC CREW ROTATION, awaiting crew from another flight (flight deck or entire
crew)
96 RO OPERATIONS CONTROL, rerouting, diversion, consolidation, aircraft
change for reasons other than technical
Miscellaneous
97 MI INDUSTRIAL ACTION WITHIN OWN AIRLINE
98 MO INDUSTRIAL ACTION OUTSIDE OWN AIRLINE, excluding ATS
99 MX NOT COVERED BY ANY OF OTHER DEFINED CODES.
If after confirming that the problem cannot be identified by us of any of the
codes in the above list, then a summary of the problem MUST be included
in the SI (Supplementary Information) element of any despatched message
Commonly Used Airline Delay & Diversion Codes
Page 4 of 4 Updated: 04 October 2004
Notes and Disclaimers:
a) Although this document conforms to the delay and diversion codes (with minor expansion, or
spelling changes to the descriptions) approved by the Airport Handling Committee for publication
in January 1999, THIS IS NOT an Official IATA Document.
The only official list is that contained in the current Airport Handling Manual, or other IATA/
Documentation containing recommendation AHM 730
b) This document as posted on www.cue-dih.co.uk may not therefore conform to the latest AHM 730
and should only be used for illustrative purposes
c) Although Alphabetic versions of the Code scheme remain valid, NUMERIC CODES have been
adopted as the PRIMARY CODE SCHEME and gradually the Alphabetical scheme will be of
historical interest only.
d) IATA recognise that as some codes provide an umbrella description of the problem, it is
recommended that SI (Supplementary Information) element of messages is used to clarify code
ambiguities [see also g) below]
e) Although IATA members can submit requests for changes or, additions to the AHM 730 Code List
for consideration at anytime. IATA policy is once a changed list is published there will be a
minimum of three years before another update is promulgated (at time of writing no change has
been made in 5 years). Following publication of a change my experience is that many airlines may
not adopt the change immediately and others may, after review continue using a previous version of
the recommendation
f) Although outside of the USA almost all Airlines base their Delay and Diversion codes on AHM 730
there are variations that apply to individual Airlines, either as in the case of this document minor
changes in the descriptive text (to assist staff to more easily identify the code to be used), or more
radical departures from the definition of a code. Other Airlines have their own codes within the
recommendations categories where there is currently available space in that categories sequence
e.g. applying a numeric code 60 for Crew being required to change Aircraft.
IATA is concerned about these variations and general non-conformance and the following
statement is part of the introduction to AHM 730:
The standardisation of codes used for this purpose is essential for commonality in EDP systems,
uniform agency handling, exchange of information, statistical comparison and management
analysis.
There are already cases where Carriers have defined for their own purposes, unused numeric codes
which are then defined with a completely different meaning in the next issue of the
recommendation. As all their computer systems and training now uses the non-standard code, they
continue to use their now non conforming Code List, to the confusion of Handling Agencies
everywhere.
g) Some airlines internally use alpha suffixes to AHM 730 codes, post operation. This is because they
find some codes too general in describing a problem and once the investigation is complete they
want to refine the cause for reporting and statistical purposes. The use of such suffixes against
AHM 730 Codes is unique to the individual Carrier concerned and even companies contracted to
perform Ground Handling are not made aware of these suffixes.
h) In the USA many carriers have evolved Code Schemes and definitions which are so different from
the IATA recommendations that even correlation of their coding scheme with AHM 730 is difficult.
In addition some US Carriers have different coding schemes for Delay and Diversion
i) One coding scheme that IATA has published a correlation table for is the Codes used by
Eurocontrol Central Flow Management Unit (CFMU) and this now forms part of AHM 730
EOE
Postscript
This is the third time I have prepared a list which conforms to the IATA Recommendation AHM 730 for Codes for
use in Messages where reasons for Delay, or Diversion are required.
The first time in the late 1980’s was specifically as part of the material for giving a course. The second combined
the course usage with a means of providing a Plastic Covered Quick Reference for Ramp Dispatch and Control
Centres for the Airline I was then consulting for. Amazingly copies of this version still surface from time to time
(14 Years later)! The reason for doing this yet again was primarily to provide a Quick Reference for the people I
work with to check off against customer implementation and variations on AHM 730 prior to pre-delivery database
build.
Douglas Holland 04th October 2004