# SDR CALA2026030314238

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2026
- Submitted: March 3, 2026
- Operation: Air carrier
- Aircraft: [N77019](https://openairdocs.org/aircraft/N77019), registered now
- Make and model: Boeing 777224
- Aircraft serial: 35547
- Aircraft time: 88,211 hours, 8,687 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: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026030314238

## Discrepancy

EMERGENCY LIGHTS, AREA ZONE 3 ,  RIGHT EXIT SIGN AND AREA LIGHTAT R4 DOOR INOPERATIVE.  THE M33409 PWR SUPPLY INOPERATIVE IAW WDM 33-51-66-3, REPLACED THE BATTERY PACK IAW AMM 33-51-06-960-802.  PERFORMED A TEST OF THE NEW BATTERY PACK,  WORKING PROPERLY.

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