What was found
L4 (M33405) EMERGENCY POWER SUPPLY BATTERY FOUND LOW CAPACITY. REPLACED L4 (M33405) EMERGENCY POWER SUPPLY BATTERY AND TEST C/O RESULT FOUND NORMAL REF AMM 33-51-06-960-802 REV104.
- Difficulty date
- September 29, 2025
- Submitted
- October 1, 2025
- Operation
- Air carrier
- Aircraft
- N2331U
- Make and model
- Boeing 777300ER
- Aircraft serial
- 62642
- Aircraft time
- 36,912 hours, 4,012 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery Pack
- Part number
- D71701100
- Condition
- Discharged
- 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.