# SDR SWAA2026091610565

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2026
- Submitted: September 17, 2026
- Operation: Air carrier
- Aircraft: [N477WN](https://openairdocs.org/aircraft/N477WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33988
- Aircraft time: 73,211 hours, 43,949 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Switch
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026091610565

## Discrepancy

CAPTAIN MASTER FIRE WARNING LIGHT DOES NOT SILENCE BELL. OK TO CONT. PER MEL 26-10-02 SP1 AUTH# 339621. REMOVED AND REPLACED CAPT FIRE WARNING LIGHT SWITCH IAW AMM 33-11-00. OPS CHECK GOOD . THIS CLEARS MEL 26-10-02

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