# SDR ASAA2015031610981

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2015
- Submitted: March 18, 2015
- Operation: Air carrier
- Aircraft: [N569AS](https://openairdocs.org/aircraft/N569AS), registered now
- Make and model: Boeing 737490
- Aircraft serial: 35184
- Aircraft time: 30,707 hours, 9,593 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 4082260939ASA
- Part serial: 31199853
- Condition: Faulted
- Location: Autopilot
- Part time: 40,245 hours, 18,147 cycles
- Stage of operation: CR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015031610981

## Discrepancy

IN CRUISE AT FL 37.0 AUTOPILOT DISENGAGED IN A TURN RE-ENGAGED WITH NO FURTHER ACTION. ACFT GROUNDED. FLT FAULT REVIEW SHOWS "MCP DATA INVALID ", B CHANNEL HAS HISTORY BOTH A & B CHANNELS.  REPLACED MCP, REF MM 22-11-34.  PERFORMED BITE GPS NR 32, 49 LAND VERIFY & FCC/AT HGS SENSOR TEST.  ALL TESTS NORMAL.  ACFT REMAINS CATIIIA AUTOLAND & HGS STATUS PLACARD REFLECTS SAME.

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