# SDR ASAA2021083035832

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2021
- Submitted: September 2, 2021
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 47,726 hours, 14,081 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Knob
- Condition: Inoperative
- Location: Control Panel
- Part time: 43,687 hours, 16,319 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/ASAA2021083035832

## Discrepancy

MCP ALTITUDE SELECTOR KNOB INOP. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL REF MM 22-11-34/401 OPS CHECK GOOD REF B737-800 MM 22-11-34-740-801. LLM LAND VERIFY COMPLETED REF MM 22-11-00/201. LLM TESTS PASS SEAMC WILL NOTIFIED.

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