# SDR 0202526717

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2002
- Submitted: August 2, 2002
- Operation: Air carrier
- Aircraft: [N617US](https://openairdocs.org/aircraft/N617US), registered now
- Make and model: Boeing 747251F
- Aircraft serial: 21121
- Aircraft time: 88,977 hours, 22,544 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Circuit Card
- Condition: Faulty
- Location: Fire Warning
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/0202526717

## Discrepancy

DURING DESCENT, THE MASTER FIRE WARNING BELL SOUNDED AND THE LIGHTS ILLUMINATED INTERMITTENTLY.  AIRCRAFT CONTINUED DESCENT AND LANDED WITHOUT INCIDENT.  REPLACED APU FIRE DETECTOR CARD.  OPERATIONAL CHECK GOOD.

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