# SDR ASAA2025122363355

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2025
- Submitted: December 29, 2025
- Operation: Air carrier
- Aircraft: [N549AS](https://openairdocs.org/aircraft/N549AS), registered now
- Make and model: Boeing 737-8FH
- Registry model: [Boeing 737-8FH](https://openairdocs.org/model/boeing-737-8fh) (OpenAirDocs)
- Aircraft serial: 30824
- Aircraft time: 68,466 hours, 24,432 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Inoperative
- Location: Zone 200
- 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/ASAA2025122363355

## Discrepancy

EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M1670 ARE INOP. GROUNDED - YES. REMOVED & REPLACED POWER SUPPLY M1670 S/N 27170, OPS CHECK GOOD. REF B737 AMM 33-51-06.

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