# SDR SWAA002744

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2000
- Submitted: December 28, 2000
- Operation: Air carrier
- Aircraft: N371SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 26598
- Aircraft time: 25,613 hours, 23,681 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 6566207
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA002744

## Discrepancy

AIR TURNBACK WHILE APU WAS OFF, RECEIVED APU FIRE INDICATION, BOTTLE WAS DISCHARGED AND LIGHT EXTINGUISHED. R&R LOWER APU FIRE LOOP DETECTOR - OPS CHECK GOOD PER MM.

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