What was found
AIRCRAFT WAS NOT GROUNDED: FAULT MESSAGE BAT/EPSU(15WL)MID L. ATA 335100 DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 15WL AND ACCOMPLISHED A SATFACTORY OPERATIONAL CHECK PER AMM 33-51-38.
- Difficulty date
- September 5, 2025
- Submitted
- September 8, 2025
- Operation
- Air carrier
- Aircraft
- N972UY
- Make and model
- Airbus A321231
- Aircraft serial
- 4123
- Aircraft time
- 52,493 hours, 20,223 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- 32146210
- Part serial
- 133412
- Condition
- No Test
- Location
- Zone 200
- Part time
- 52,493 hours, 20,223 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.