What was found
AIRCRAFT WAS NOT GROUNDED: DURING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. FOUND EMERGENCY POWER SUPPLY UNIT (11WL) EXTERNAL LEFT FAULT. REMOVED AND REPLACED 11WL EMERGENCY POWER SUPPLY UNIT BATTERY.
- Difficulty date
- June 25, 2023
- Submitted
- June 27, 2023
- Operation
- Air carrier
- Aircraft
- N447AN
- Make and model
- Airbus A321253NX
- Aircraft serial
- 10705
- Aircraft time
- 5,405 hours, 1,427 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 321431
- Condition
- No Test
- Location
- Zone 200 - Fuse
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.