Service difficulty report · Bypass Valve · Airbus A321271NX
FAA SDR system
- Difficulty date
- December 25, 2025
- Submitted
- December 26, 2025
- Operation
- Air carrier
- Make and model
- Airbus A321271NX
- Aircraft serial
- 10254
- Aircraft time
- 17,299 hours, 3,224 cycles
- Part
- Bypass Valve
- Part number
- 1312B000001
- Part serial
- 131211577
- Condition
- Warning Message
- Location
- A/C Pack
- Part time
- 9,610 hours, 3,754 cycles
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 133 BOS- SFO ( ETOPS). (ECAM INDICATION 3) ON BLEED PAGE B) PACK TURBINE BYPASS VALVE POSITION).; REPLACED ASCS 2 (57HH) PER TECH SUPPORT REQUEST. OPS CHECK GOOD. WORK DONE IAW AMM 21-61-34-400-002-A. MDDR CLOSED, MX-4 UPDATED, PLACARD REMOVED.