What was found
DURING AN OVERNIGHT LINE CHECK THE EMERGENCY EXIT SIGN ABOVE DOOR 1 LEFT WOULD NOT ILLUMINATE. MAINTENANCE FOUND BATTERY PACK M731 TO BE DEFECTIVE AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER THE BATTERY PACK WAS REPLACED.
- Difficulty date
- July 27, 2009
- Submitted
- July 28, 2009
- Operation
- Air carrier
- Aircraft
- N523US
- Make and model
- Boeing 757251
- Aircraft serial
- 23617
- Aircraft time
- 73,225 hours, 30,294 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- 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.