What was found
UPPER DECK CEILING EMERGENCY LIGHTS BETWEEN SEAT 73 WILL NOT TURN-OFF AFTER 20 SEC. REPLACED BATTERY-POWER SUPPLY AT M335. FUNCTIONAL CHECK OK AS PER B747-400 AMM 33-51. AFFECTED LTS STAY ON AFTER 20 SEC. (7856385)
- Difficulty date
- December 14, 2016
- Submitted
- December 16, 2016
- Operation
- Air carrier
- Aircraft
- N667US
- Make and model
- Boeing 747451
- Aircraft serial
- 24222
- Aircraft time
- 112,687 hours, 13,736 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Condition
- Inoperative
- Location
- Emergency Lights
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.