What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY UNIT SYSTEM TEST SHOWED "EMERGENCY POWER SUPPLY UNIT 11WL" MESSAGE. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 11WL BATTERY PER AMM 33-51-38.
- Difficulty date
- March 17, 2020
- Submitted
- March 20, 2020
- Operation
- Air carrier
- Aircraft
- N914UY
- Make and model
- Airbus A321231
- Aircraft serial
- 6337
- Aircraft time
- 19,105 hours, 7,400 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Condition
- Discharged
- Location
- Cabin
- 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.