# SDR ASAA2018013123365

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2018
- Submitted: February 2, 2018
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 39,233 hours, 11,853 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 4282H7
- Condition: Defective
- Location: Cockpit
- Part time: 13,674 hours, 4,506 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018013123365

## Discrepancy

F/O'S COURSE SELECTION KNOB WAS INOPERATIVE.  ACFT GROUNDED.  REMOVED AND REPLACED MCP IAW AMM 22-11-34.  OPS CHECKED NORMAL.  DEFECT WAS VERIFIED. ALL LLM TESTS PASSED IAW AMM 22-00-01.

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