# SDR KNNA20080002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2008
- Submitted: February 28, 2008
- Operation: Air carrier
- Aircraft: N737Q
- Make and model: Boeing 737-2L9
- Registry model: [Boeing 737-2L9](https://openairdocs.org/model/boeing-737-2l9) (OpenAirDocs)
- Aircraft serial: 21279
- Aircraft time: 45,822 hours, 39,122 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: False Activation
- Location: Apu Bay
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KNNA20080002

## Discrepancy

APU FIRE WARNING ON APPROACH.  APU WAS NOT OPERATING AND WAS CURRENTLY ON MEL 49-01 DMI 737-08-20.  CAPTAIN'S AFTER LANDING INSPECTION FOUND NO EVIDENCE OF FIRE OR/OVERHEAT.  PILOTS FOLLOWED AFM PROCEDURES AND FIRED APU FIRE EXTINGUISHER BOTTLE.

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