What was found
AIRCRAFT WAS NOT GROUNDED. WHILE PERFORMING OPERATIONS TEST OF EMERGENCY LIGHTS, CLASS ONE MESSAGE "33-50-00 EPSU 13WL AFT LEFT". REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY (13WL) PER AMM 33-51-38. OPERATIONS CHECK GOOD.
- Difficulty date
- June 21, 2018
- Submitted
- June 23, 2018
- Operation
- Air carrier
- Aircraft
- N134AN
- Make and model
- Airbus A321231
- Aircraft serial
- 6495
- Aircraft time
- 10,371 hours, 4,044 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 321431
- Part serial
- 775677
- Condition
- Discharged
- 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.