What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY UNIT 12WL FAILED DURING CIDS TESTING. REPLACED REPLACED BATTERY FOR EMERGENCY POWER SUPPLY UNIT 12WL AND ACCOMPLISHED A SATISFACTORY CHECK.
- Difficulty date
- May 19, 2023
- Submitted
- May 19, 2023
- Operation
- Air carrier
- Aircraft
- N412UW
- Make and model
- Airbus A321253NX
- Aircraft serial
- 9224
- Aircraft time
- 10,907 hours, 2,988 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
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.