What was found
AIRCRAFT IN BASE MAINTENANCE: BAT/EPSU (10WL) FWD L FAULT DISPLAYED DURING SYSTEM TEST. REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AALA202509084615) AND BATTERY (AALA202509084615) PER AMM 33-51-38.
- Difficulty date
- September 8, 2025
- Submitted
- September 8, 2025
- Operation
- Air carrier
- Aircraft
- N156AN
- Make and model
- Airbus A321231
- Aircraft serial
- 6983
- Aircraft time
- 28,578 hours, 11,404 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- AD321431
- Condition
- Abnormal
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.