# SDR UIEA2013051700295

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2013
- Submitted: May 17, 2013
- Operation: Air carrier
- Aircraft: [N409MC](https://openairdocs.org/aircraft/N409MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30558
- Aircraft time: 57,078 hours, 8,541 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Circuit Card
- Condition: Malfunctioned
- Location: Fire Warning
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2013051700295

## Discrepancy

FIRE WARNING BELL SOUNDS CONTINUOUSLY WITH RED MASTER BUT NO ASSOCIATED FIRE SYS RED LIGHT.  FOUND A-3 CARD, MASTER MON A FAULTING. CARD REPLACED AND OPERATES NORMAL IAW MM.

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