What was found
DOOR 4L EMERGENCY POWER SUPPLY BATTERY FAILED TEST. BATTERY REPLACED IAW AMM 33-51-00. INSTALLATION TEST CARRIED OUT FO DOOR 4L EMERGENCY POWER SUPPLY BATTERY (M33406) AS PER AMM33-51-00, FOUND WORKING SATISFACTORY.
- Difficulty date
- November 26, 2025
- Submitted
- November 28, 2025
- Operation
- Air carrier
- Aircraft
- N2534U
- Make and model
- Boeing 777300ER
- Aircraft serial
- 62645
- Aircraft time
- 36,808 hours, 4,060 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- D71701100
- Part serial
- 426732
- Condition
- Inoperative
- Location
- Zone 200
- 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.