# SDR ASAA2023020241772

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2023
- Submitted: February 4, 2023
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 27,017 hours, 8,327 cycles
- System (JASC): [2610 · Detection System](https://openairdocs.org/jasc/2610)
- Part: Detector
- Part number: 90202001
- Condition: Inoperative
- Location: Apu Cowl Door
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023020241772

## Discrepancy

APU DET INOP. GROUNDED - YES. TROUBLESHOT IAW B737-900 FIM 26-10 TASK 801. BITE PROCEDURE INDICATED APU TAILPIPE DETECTOR FAULT. REMOVED AND REPLACED APU TAILPIPE OVERHEAT DETECTOR IAW B737-900 AMM 26-15-01.

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