# SDR ASAA2023052243312

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2023
- Submitted: May 26, 2023
- Operation: Air carrier
- Aircraft: [N952AK](https://openairdocs.org/aircraft/N952AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 60390
- Aircraft time: 2,388 hours, 696 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Computer
- Part number: 8221604102
- Part serial: 4T1DLM
- Condition: Faulted
- Location: E/E Bay
- Stage of operation: CR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023052243312

## Discrepancy

AT CRUISE AFTER EXPERIENCING A SLIGHT WAVE WITH AUTOPILOT ON, PITCH TRIM CONTINUED TRIMMING UP THEN DOWN UNTIL A/P WAS TURNED OFF. GROUNDED - YES.   REMOVED AND REPLACED FCC-B, REF B737-9 AMM 22-11-33.

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