What was found
AIRCRAFT WAS GROUNDED: FAULT MESSAGE BAT / EPSU (14WL) MID R DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED THE BATTERY FOR EMERGENCY POWER SUPPLY UNIT 14WL.
- Difficulty date
- September 11, 2026
- Submitted
- September 14, 2026
- Operation
- Air carrier
- Aircraft
- N154AA
- Make and model
- Airbus A321231
- Aircraft serial
- 6928
- Aircraft time
- 32,638 hours, 13,041 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.