What was found
PERFORM DEEP-CYCLE EMERGENCY LIGHT BATTERY PACK CAPACITY CHECK F OUND BATTERY M33099 POOR CAPACITY. REPLACED THE EMERGENCY LIGHT BATTERY M 33099 AND CARRIED OUT OPERATIONAL TEST FOUND NORMAL AS PER AMM 3 3-51-06-960-802 REV 92.
- Difficulty date
- July 24, 2021
- Submitted
- July 26, 2021
- Operation
- Air carrier
- Aircraft
- N76021
- Make and model
- Boeing 777224
- Aircraft serial
- 39776
- Aircraft time
- 49,853 hours, 4,633 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Battery
- Part number
- ADD7170110
- Part serial
- 259840
- Condition
- Discharged
- Location
- Emergency Lights
- 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.