# SDR AALA202009249005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2020
- Submitted: September 24, 2020
- Operation: Air carrier
- Aircraft: [N781AN](https://openairdocs.org/aircraft/N781AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29586
- Aircraft time: 80,296 hours, 9,765 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Part serial: 58589
- Condition: Inoperative
- 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/AALA202009249005

## Discrepancy

AIRCRAFT WAS GROUNDED: AFT CABIN R4 DOOR EMERGENCY POWER SUPPLY M33409 FAILED TEST.  REMOVED AND REPLACED AFT CABIN R4 DOOR M33409 POWER SUPPLY, PER AMM 33-51-06-960-803.

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