What was found
AIRCRAFT WAS NOT GROUNDED: 11WL FLAGGED AS A FAILURE ON EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. REPLACED BATTERY FOR EMERGENCY POWER SUPPLY UNIT 11WL AND ACCOMPLISHED A SATISFACTORY OPPERATIONAL CHECK PER AMM 33-51-38.
- Difficulty date
- May 26, 2025
- Submitted
- May 27, 2025
- Operation
- Air carrier
- Aircraft
- N544UW
- Make and model
- Airbus A321231
- Aircraft serial
- 4847
- Aircraft time
- 43,636 hours, 17,546 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.