What was found
AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT SYSTEM TEST FAILED AT LOCATION 11WL DURING PS CHECK. REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY AT LOCATION 11WL PER AMM 33-51-38.
- Difficulty date
- May 30, 2021
- Submitted
- June 1, 2021
- Operation
- Air carrier
- Aircraft
- N977UY
- Make and model
- Airbus A321231
- Aircraft serial
- 5409
- Aircraft time
- 27,153 hours, 10,808 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Condition
- No Test
- Location
- Emergency Lights
- 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.