What was found
AIRCRAFT WAS NOT GROUNDED: FAULT MESSAGE BAT EPSU (12WL) EXT R DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED EMERGENCY POWER SIUPPLY UNIT 12WL AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.
- Difficulty date
- September 9, 2025
- Submitted
- September 11, 2025
- Operation
- Air carrier
- Aircraft
- N971UY
- Make and model
- Airbus A321231
- Aircraft serial
- 6249
- Aircraft time
- 35,553 hours, 14,545 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- 32146210
- Part serial
- 146619
- Condition
- No Test
- Location
- Zone 200
- Part time
- 35,552 hours, 14,545 cycles
- 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.