# SDR FDEA202608201198

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2026
- Submitted: August 21, 2026
- Operation: Air carrier
- Aircraft: [N939FD](https://openairdocs.org/aircraft/N939FD), registered now
- Make and model: Boeing 757-23A
- Registry model: [Boeing 757-23A](https://openairdocs.org/model/boeing-757-23a) (OpenAirDocs)
- Aircraft serial: 24528
- Aircraft time: 67,703 hours, 26,804 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131A
- Part serial: 119419
- Condition: Failed
- Location: Zone 200
- 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/FDEA202608201198

## Discrepancy

INTERIOR EXIT LIGHT WILL NOT TEST.  REMOVED AND REPLACED FWD BATTERY POWER SUPPLY IAW  ABOVE REF. AFTER REPLACMENT FOUND CTR EXIT LIGHT  AND R1 EXIT LIGHT OPS CHK SERVICEABLE. L1 DOOR OVERHEAD EXIT LIGHT AND FLT DECK EMER LIGHT  INOP.  PRESSED COURIER TEST BUTTON ABOVE L1 DOOR AND LIGHTS REPORTED AS INOP ILLUMINATED FOR A BRIEF SECOND BEFORE IMMEDIATELY EXTINGUISHING.  R & R AFT BATTERY PACK & ALL EMER LIGHTS NOW TEST PROPERLY. PLACARD REMOVED. OK FOR SERVICE.

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