# SDR AALA201610199020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2016
- Submitted: October 21, 2016
- Operation: Air carrier
- Aircraft: N941UW
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27806
- Aircraft time: 71,491 hours, 25,990 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 20131A
- Condition: Inoperative
- Location: Cabin
- 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/AALA201610199020

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE.  EXIT LIGHTS WILL NOT TEST IN FOUR PLACES: L3 INTERIOR DOOR; L3 EXTERIOR DOOR; R3 DOOR SIDE EXIT LIGHT; AND EMERGENCY LIGHT AT ROW 21L.  REPLACED EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-07-902-001.

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