# SDR ASAA2014103009543

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2014
- Submitted: November 4, 2014
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 7,553 hours, 2,374 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Malfunctioned
- Location: B
- 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/ASAA2014103009543

## Discrepancy

ABOUT ONE HOUR INTO CRUISE AT FL 320, AUTOPILOT B ENGAGED, THE AUTOPILOT DISCONNECTED WITHOUT CAUSE.  DID NO RECUR AFTER ENGAGED.  ACFT GROUNDED.  ACCOMPLISHED FLIGHT FAULT REVIEW.  ACCOMPLISHED TEST IAW 22-11-34-501 BITE GROUP 32, TEST PASSED.  HGS TEST OK, REF 34-36-00.

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