What was found
AIRCRAFT IN BASE MAINTENANCE - EPSU (EMERGENCY POWER SUPPLY UNIT) SYSTEM TEST, ERROR MESSAGE: BAT/EPSU (14WL) MID R. TROUBLESHOOTING PER TSM 33-51-00. REMOVED AND REPLACED EPSU 14WL PER AMM 33-58-00, OPERATIONAL CHECK GOOD.
- Difficulty date
- July 15, 2020
- Submitted
- July 16, 2020
- Operation
- Air carrier
- Aircraft
- N128AN
- Make and model
- Airbus A321231
- Aircraft serial
- 6346
- Aircraft time
- 19,958 hours, 5,519 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Epsu
- Part number
- 32146210
- Part serial
- 147173
- Condition
- Unserviceable
- Location
- Cabin
- 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.