# SDR ASAA2022081339546

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2022
- Submitted: August 19, 2022
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 25,730 hours, 7,993 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 17CLM6
- Condition: Inoperative
- Location: Flight Compartme
- Part time: 45,750 hours, 13,997 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022081339546

## Discrepancy

IAS/MACH ADJUSTMENT KNOB WILL NOT ADJUST SPEED WHEN AP A OF FD #1 IS MASTER. ALSO, AP DISCONNECTED AT CRUISE. WE WERE ABLE TO RENGAGE AP A. GROUNDED - YES. REMOVED & REPLACED MCP REF B737-900 AMM 22-11-34-400-801.

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