# SDR ASAA2013111296392

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 2013
- Submitted: November 15, 2013
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 21,814 hours, 6,693 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Condition: Malfunctioned
- Location: Autopilot
- Part time: 45,135 hours, 19,827 cycles
- Stage of operation: CR
- 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/ASAA2013111296392

## Discrepancy

AUTOPILOT HAD TWO UNCOMMANDED DISENGAGEMENTS DURING CRUISE FLT IN SMOOTH CONDITIONS.  ACFT GROUNDED.  DFCS A&B LOGGED MULTIPLE MCP FAILURES FAULT MSG 22-11607.  R & R MCP REF MM 22-11-34, OPS CHECK NORMAL.  ACCOMPLISHED MCP LWMP CHECKS REF LWMP CHECKLIST MM 22-00-01,TESTS PASSED.  ACFT UPGRADED TO CAT IIIA AUTOLAND & HGS.

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