What was found
AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT 15WL BATTERY FAULT DISPLAYED DURING FUNCTIONAL TEST. REPLACED BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.
- Difficulty date
- September 7, 2021
- Submitted
- September 9, 2021
- Operation
- Air carrier
- Aircraft
- N524UW
- Make and model
- Airbus A321231
- Aircraft serial
- 3977
- Aircraft time
- 41,442 hours, 15,113 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- AD321431
- Condition
- Faulted
- Location
- Emergency Lights
- 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.