What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT BATTERY MID LEFT FAILS TEST. **SUPPLEMENTAL REPORT REQUIRED** (OPEN)
- Difficulty date
- December 9, 2021
- Submitted
- December 10, 2021
- Operation
- Air carrier
- Aircraft
- N178US
- Make and model
- Airbus A321211
- Aircraft serial
- 1519
- Aircraft time
- 67,374 hours, 25,577 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- None
- Condition
- None
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.