What was found
AIRCRAFT WAS NOT GROUNDED: DURING THE PS CHECK EPSU SYSTEM TEST, FOUND EPSU (12WL) DID NOT PASS THE TEST. MAINTENANCE REPLACED BATTERY FOR EPSU (12WL) IAW AMM 33-51-38.
- Difficulty date
- July 15, 2026
- Submitted
- July 17, 2026
- Operation
- Air carrier
- Aircraft
- N198UW
- Make and model
- Airbus A321211
- Aircraft serial
- 5444
- Aircraft time
- 42,706 hours, 17,590 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.