# SDR AALA20170728015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2017
- Submitted: August 1, 2017
- Operation: Air carrier
- Aircraft: [N790AN](https://openairdocs.org/aircraft/N790AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30251
- Aircraft time: 67,868 hours, 8,693 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Part serial: 54263
- Condition: Inoperative
- Location: Cabin
- Part time: 16,274 hours, 3,246 cycles
- 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/AALA20170728015

## Discrepancy

AIRCRAFT WAS IN BASE MAINTENANCE.  EMERGENCY EXIT LIGHT IN THE RIGHT AFT ZONE CEILING IS INOPERATIVE.  REMOVED AND REPLACED POWER SUPPLY M33401 PER AMM 33-51-06.  OPERATIONAL CHECK GOOD.

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