# SDR ASAA2012092992966

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2012
- Submitted: October 3, 2012
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 19,080 hours, 6,072 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 16D3KL
- Condition: Failed
- Location: Cockpit
- Part time: 22,791 hours, 7,093 cycles
- Stage of operation: CL
- 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/ASAA2012092992966

## Discrepancy

ON CLIMBOUT HEADING SELECTOR & BUG INTERMITTENTLY FROZE (BUG DISPLAY ON PFD/ND WOULD NOT MOVE) DURING CRUISE HDG WINDOW WOULD INTERMITTENTLY MOVE ON ITS ON - WITHOUT PILOT INPUT (BUG DISPLAY ON PFD/ND WOULD FOLLOW HEADING WINDOW DISPLAY.  ACFT GROUNDED.  R & R DFCS MODE CONT PANEL REF MM 22-11-400-801. LRU INTERFACE TEST FOR MCP PASSED IAW MM 22-11-34-501, GRP 32 & LAND VERIFY TEST PASS REF MM 22-11-00-201, GRP 49 & HGS SENSOR TEST FOR FCC PASSED. REF SMM 34-36-00.

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