# SDR AALA202302201929

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2023
- Submitted: February 20, 2023
- Operation: Air carrier
- Aircraft: [N725AN](https://openairdocs.org/aircraft/N725AN), registered now
- Make and model: Boeing 777323ER
- Aircraft serial: 41666
- Aircraft time: 38,770 hours, 4,471 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Inoperative
- Location: Zone 200 - Fuse
- 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/AALA202302201929

## Discrepancy

AIRCRAFT WAS GROUNDED: DURING EMERGENCY LIGHT TEST, MAINTENANCE FOUND BUSINESS SECTION EMERGENCY LIGHTS INOPERATIVE. REPLACED EMERGENCY LIGHTING BATTERY PACK POWER SUPPLY M33404 PER AMM 33-51-06. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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