What was found
DR 5L M33407 EMER LT BATTERY CAPACITY CHECK FAIL. DR3L M33407 EMERGENCY LT BATTERY CAPACITY CHECK FAILED. BATTERY REPLACED AND CHECKED NORMAL IAW AMM 33-51-06.
- Difficulty date
- May 1, 2026
- Submitted
- May 5, 2026
- Operation
- Air carrier
- Aircraft
- N2644U
- Make and model
- Boeing 777300ER
- Aircraft serial
- 63724
- Aircraft time
- 38,193 hours, 4,093 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- D71701100
- Condition
- Faulted
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.