What was found
AIRCRAFT WAS NOT GROUNDED: FAULT MESSAGE FOR EMERGENCY POWER SUPPLY UNIT 14WL DISPLAYED DURING SYSTEM TEST. REPLACED BATTERY FOR EMERGENCY POWER SUPPLY UNIT 14WL AND ACCOMPLISHED A SATISFACTORY OPS CHECK PER AMM 33-51-38.
- Difficulty date
- January 14, 2026
- Submitted
- January 15, 2026
- Operation
- Air carrier
- Aircraft
- N974UY
- Make and model
- Airbus A321231
- Aircraft serial
- 4898
- Aircraft time
- 45,531 hours, 18,161 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- 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.