# SDR ASAA2023020441816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2023
- Submitted: February 7, 2023
- Operation: Air carrier
- Aircraft: [N973AK](https://openairdocs.org/aircraft/N973AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43346
- Aircraft time: 3,200 hours, 923 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Not Reported
- Part number: NOTREPORTED
- Part serial: NOTREPORTED
- Condition: Not Reported
- Location: Not Reported
- Stage of operation: DE
- 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/ASAA2023020441816

## Discrepancy

UPON PUSHING MASTER CAUTION DURING DESCENT CHECKLIST "SPEED TRIM FAIL" LIGHT ILLUMINATED ALONG WITH FLT CONT MASTER CAUTION LIGHT. LIGHT EXTINGUISHES UPON RESET OF MASTER CAUTION SYSTEM. GROUNDED - YES. RAN B737-9 FIM 22-11-00-810-D71, BITE TESTS PASSED, FAULT CLEARED.

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