- Difficulty date
- February 8, 2026
- Submitted
- February 9, 2026
- Operation
- Air carrier
- Make and model
- Airbus A321271NX
- Aircraft serial
- 10254
- Aircraft time
- 17,790 hours, 3,318 cycles
- Engine
- Iae PW1133GJM
- Part
- Pump
- Part number
- 10152006
- Part serial
- 3WLAA01636
- Condition
- Failed
- Location
- Nr 1 Engine
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 2233 BOS- SFO (ETOPS). " #1 ENG HEAT SYS DEGRADE ( HEAT SYS DEGRAD CAUTIONS ON ECAM E/WD ).; REMOVED AND REPLACED ENG FUEL / OIL HEAT EXCHANGER BYPASS VLV IAW AMM 79-21-09 NO LEAKS NOTED ENGINE RUN PERFORMED. ALL PARAMETER NORMAL MX-4 UPDATED PLACARD REMOVED MDDR CLEARED .