What was found
UPPER DECK AFT EXIT SIGN WOULD NOT ILLUMINATE. MAINTENANCE REPLACED THE BATTERY AT M6378 POWER SUPPLY. SYSTEM OPS IS NORMAL.
- Difficulty date
- July 9, 2016
- Submitted
- July 13, 2016
- Operation
- Air carrier
- Aircraft
- N670US
- Make and model
- Boeing 747451
- Aircraft serial
- 24225
- Aircraft time
- 109,174 hours, 13,350 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- 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.