# SDR ASAA2023081044515

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2023
- Submitted: August 11, 2023
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 52,345 hours, 15,459 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Overheat Sensor
- Part number: 90202001
- Condition: Faulty
- Location: Apu
- 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/ASAA2023081044515

## Discrepancy

INTERMITTENT "APU DET INOP" CAUTION LIGHT ON FIRE CONTROL PANEL AND MASTER CAUTION. GROUNDED - YES. R/R APU TAILPIPE OVERHEAT DETECTOR ASSY M1925. REF B737-800 AMM 26-15-01. APU FIRE DETECTION OPS TEST GOOD.

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