# SDR FDEA202112083050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2021
- Submitted: December 9, 2021
- Operation: Air carrier
- Aircraft: [N775FD](https://openairdocs.org/aircraft/N775FD), registered now
- Make and model: Boeing 757-200 SERIES
- Registry model: [Boeing 757-200 SERIES](https://openairdocs.org/model/boeing-757-200-series) (OpenAirDocs)
- Aircraft serial: 25043
- Aircraft time: 80,968 hours, 31,275 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131A
- Condition: Failed
- Location: N/A
- Stage of operation: IN
- How discovered: V
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202112083050

## Discrepancy

EMERGENCY LIGHTING WILL NOT TEST PROPERLY.   REMOVED AND REPLACED BATTERY PACK IN POSITION M731.  OPS CHECK NORMAL REF B757 AMM 33-51-07-2 AND WDM  33-51-12. AIRCRAFT OK FOR SERVICE.

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