# SDR ASAA2022122141236

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2022
- Submitted: January 11, 2023
- Operation: Air carrier
- Aircraft: [N486AS](https://openairdocs.org/aircraft/N486AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44107
- Aircraft time: 26,888 hours, 8,464 cycles
- System (JASC): [2610 · Detection System](https://openairdocs.org/jasc/2610)
- Part: Smoke Detector
- Part number: 4735975
- Condition: Faulty
- Location: Aft Cargo Compt
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022122141236

## Discrepancy

AFT CARGO FIRE TEST IN "NORMAL" WILL NOT TEST AND SHOWS "DETECTOR FAULT" "DET SELECT B." APPEARS INOP SYSTEM TESTS NOORMAL IN "DET SELECT A" POSITION. GROUNDED - YES. REMOVED & REPLACED AFT CARGO SMOKE DETECTOR (M2245). OPS CHECK GOOD REF B737-900 AMM 26-16-01.

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