What was found
AIRCRAFT WAS NOT GROUNDED: AFTER EMERGENCY LIGHT TEST. BAT/EPSU (11WL) EXT L FAULT MESSAGE APPEARED. MAINTENANCE REPLACED BATTERY UNIT IN EPSU (11WL) IAW AMM 33-51-38.
- Difficulty date
- June 18, 2026
- Submitted
- June 22, 2026
- Operation
- Air carrier
- Aircraft
- N150UW
- Make and model
- Airbus A321211
- Aircraft serial
- 5504
- Aircraft time
- 40,706 hours, 17,006 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- AD321431
- Condition
- Inoperative
- 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.