What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT (13WL) AFT LEFT FAILED TEST. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY (13WL) PER A321 AMM 33-51-38-000-003.
- Difficulty date
- July 18, 2021
- Submitted
- July 19, 2021
- Operation
- Air carrier
- Aircraft
- N976UY
- Make and model
- Airbus A321231
- Aircraft serial
- 5235
- Aircraft time
- 28,434 hours, 11,271 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Condition
- Failed
- Location
- Zone 200 - Fuse
- 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.