# SDR CALA2021100601791

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2021
- Submitted: October 6, 2021
- Operation: Air carrier
- Aircraft: [N77022](https://openairdocs.org/aircraft/N77022), registered now
- Make and model: Boeing 777224
- Aircraft serial: 39777
- Aircraft time: 52,046 hours, 4,953 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: Battery Pack
- Part number: 071701100
- Part serial: 74414
- Condition: Discharged
- Location: Door / L-3
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021100601791

## Discrepancy

DOOR L3 EMERGENCY LIGHT BATTERY PACK M33400 FOUND CAPACITY LOW D URING DEEP CYCLE,REFER HAECO NON-ROUTINE LP:9459704,ORIGINATED B Y EMP V905359,SPEC NO.B777-33-3-7019. PERFORMED BY EMP V903672,REPLACED DOOR L3 PACK M33400 AND PERFOR MED OPERATIONAL TEST OF THE NEW BATTERY PACK THE RESULT WAS NORM AL PER AMM 33-51-06-960-802 REV 92.

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