What was found
AIRCRAFT IN BASE MAINTENANCE: BATTERY FAULT FOR EMERGENCY POWER SUPPLY UNIT 11WL DISPLAYED DURING SYSTEM TEST. REPLACED BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38 WITH NO FAULTS NOTED.
- Difficulty date
- September 22, 2025
- Submitted
- September 23, 2025
- Operation
- Air carrier
- Aircraft
- N166NN
- Make and model
- Airbus A321231
- Aircraft serial
- 6973
- Aircraft time
- 28,185 hours, 11,221 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- AD321431
- Condition
- No Test
- 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.