# SDR CALA2025100909851

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2025
- Submitted: October 9, 2025
- Operation: Air carrier
- Aircraft: [N797UA](https://openairdocs.org/aircraft/N797UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26924
- Aircraft time: 110,643 hours, 14,294 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- Condition: Inoperative
- Location: Zone 200
- 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/CALA2025100909851

## Discrepancy

LLAR EMERGENCY LIGHT POWER SUPPLY M023 BATTERY PACK FOUND POOR CONDITION.   REPLACED THE LLAR EMERGENCY LIGHT POWER SUPPLY M023 BATTERY PACK AND PERFORMED NEW BATTERY INSTALLATION TEST IAW AMM 33-51-06-960-803 REV.105.   THE TEST RESULT FOUND NORMAL.

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