# SDR ASAA2013112596531

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 25, 2013
- Submitted: November 27, 2013
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 21,268 hours, 6,634 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102AS
- Part serial: 171MM8
- Condition: Failed
- Location: Flight Deck
- Part time: 21,274 hours, 6,635 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013112596531

## Discrepancy

WHILE PERFORMING LAND VERIFY TEST, A AUTOPILOT WOULD NOT ENGAGE WITH FAULT 22-11251. FOUND AN AUTOPILOT ENG INTERLOCK CIRCUIT BREAKER TRIPPED AND WOULD NOT RESET.  ACFT GROUNDED.  REPLACED MODE CONTROL PANEL, IAW MM 22-11-34,  CHECKED GOOD.  LLRU REPLACEMENT TEST REF MM 22-11-34/I501BITE TEST GROUP 32 AND AND LAND VERIFY TEST REF MM 22-11-00/201 BITE TEST GROUP 49 AND HGS FFC/AT TEST REF SSM 34-36-0  ALL CHECKED GOOD.

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