What was found
FLT#133, BOS-SFO. (ETOPS) 'APU INOP DUE TO UNSUCCESSFUL CSS ( APU SYSTEM A321NEO ETOPS ); REMOVED AND REPLACED APU LOW OIL PSI SWITCH IAW AMM 49-94-84 OPS CHECK GOOD MX-4 UPDATED MDDR CLEAR.'
- Difficulty date
- January 20, 2025
- Submitted
- January 21, 2025
- Operation
- Air carrier
- Aircraft
- N2142J
- Make and model
- Airbus A321271NX
- Aircraft serial
- 10254
- Aircraft time
- 13,308 hours, 2,482 cycles
- System (JASC)
- 4920 · APU Core Engine
- Part
- Pressure Switch
- Part number
- 38762552
- Part serial
- JB31453
- Condition
- Failed
- Location
- Apu
- Part time
- 1,210 hours, 900 cycles
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.