# SDR CALA2021031200315

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2021
- Submitted: March 12, 2021
- Operation: Air carrier
- Aircraft: [N204UA](https://openairdocs.org/aircraft/N204UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 28713
- Aircraft time: 94,562 hours, 12,441 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: No Test
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021031200315

## Discrepancy

EMERGENCY LIGHT BATTERY PACK DEEP-CYCLE TEST FOUND R4 BATTERY M33408 CAN NOT KEEP LT ON 15 MINUTES,REF HAECO NON-ROUTINE NO.V9427552 ORIGINATED BY EMP V905404 SPEC NO.B777-33-3-7019. PERFORMED BY EMP V907744, REPLACED THE R4 BATTERY PACK M33408 AND DO THE INSTALLATION TEST, THE TEST RESULT NORMAL,REF AMM 33-51-06-960-802 REV.90.

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