# SDR ASAA2021092436070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2021
- Submitted: September 27, 2021
- Operation: Air carrier
- Aircraft: [N517AS](https://openairdocs.org/aircraft/N517AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35197
- Aircraft time: 46,255 hours, 13,521 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 40LDKD
- Condition: Inoperative
- Location: Flight Compartme
- Part time: 24,733 hours, 7,693 cycles
- Stage of operation: NR
- 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/ASAA2021092436070

## Discrepancy

CAPTAIN'S COURSE SELECT KNOB INTERMITTENTLY LOCKS. GROUNDED - YES. WITH A/C POWER OFF THE AIRPLANE REPLACED DFCS MODE CONTROL PANEL WITH SERVICEABLE UNIT. APPLIED GROUND POWER TO A/C. C/W DFCS MODE CONTROL PANEL ADJUSTMENT/TEST. TEST PASSED. REF B737-800 AMM 22-11-34.

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