What was found
AIRCRAFT FAILED THE EMERGENCY LIGHT SYSTEM TEST, WITH A 'EPSU AFT L' MESSAGE. MAINTENANCE REPLACED BATTERIES FOR THE AFT LEFT EMERGENCY POWER SUPPLY UNIT (13WL). OPERATIONALLY CHECKS OK. (M)
- Difficulty date
- June 29, 2003
- Submitted
- July 22, 2003
- Operation
- Air carrier
- Aircraft
- N164UW
- Make and model
- Airbus A321211
- Aircraft serial
- 1425
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- 321430
- Condition
- Inoperative
- Location
- Emergency Light
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.