# SDR AALA202512192561

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2025
- Submitted: December 19, 2025
- Operation: Air carrier
- Aircraft: [N731AN](https://openairdocs.org/aircraft/N731AN), registered now
- Make and model: Boeing 777323ER
- Aircraft serial: 33523
- Aircraft time: 44,454 hours, 5,163 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulted
- 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/AALA202512192561

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING WC 72T20033001 ACCOMPLISHMENT IT WAS FOUND BOTH BACKUP POWER SUPPLY FAULT AT OFAR.  MAINTENANCE REPLACED BOTH BACKUP POWER SUPPLY AT OFAR IAW AMM 33-29-12, TESTED OK.

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