What was found
AIRCRAFT IN BASE MAINTENANCE: DURING THE EMERGENCY LIGHT OPERATIONAL CHECK WITH THE MCDU EMERGENCY POWER SUPPLY 12WL BATTERY WAS INOPERATIVE. REPLACED BATTERY.
- Difficulty date
- March 12, 2021
- Submitted
- March 19, 2021
- Operation
- Air carrier
- Aircraft
- N921US
- Make and model
- Airbus A321231
- Aircraft serial
- 6523
- Aircraft time
- 18,424 hours, 7,099 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 321431
- 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.