What was found
AIRCRAFT WAS NOT GROUNDED: 12WL EMERGENCY POWER SUPPLY UNIT FAILED CABIN INTERCOMMUNICATION DATA SYSTEM 1 SYSTEM TEST. RESEATED EMERGENCY POWER SUPPLY UNIT BATTERY OPERATIONS CHECK GOOD.
- Difficulty date
- September 17, 2021
- Submitted
- September 20, 2021
- Operation
- Air carrier
- Aircraft
- N556UW
- Make and model
- Airbus A321231
- Aircraft serial
- 5244
- Aircraft time
- 28,948 hours, 11,629 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.