B737 captain experienced a MCP failure at FL380 causing the autopilot to disconnect. Maintenance is contacted and a circuit breaker reset restores the MCP to normal operation.

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Attributes
ACN	1284836
Time
Date	201508
Local Time Of Day	1801-2400
Place
Locale Reference	ZLC.ARTCC
State Reference	UT
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	MCP
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 113 Flight Crew Total 15214 Flight Crew Type 12232
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

During cruise at FL380 and 5 hours into the flight the autopilot tripped off along with the MCP completely blank. The MCP panel had no numbers displayed or background lights. The MCP panel would flicker on and off. Advised ATC. Dispatch and maintenance [were] contacted. Emergency authority was used to cycle circuit breakers with maintenance guidance. The systems were restored.

Original NASA ASRS Text

Title: B737 Captain experienced a MCP failure at FL380 causing the autopilot to disconnect. Maintenance is contacted and a circuit breaker reset restores the MCP to normal operation.

Narrative: During cruise at FL380 and 5 hours into the flight the autopilot tripped off along with the MCP completely blank. The MCP panel had no numbers displayed or background lights. The MCP panel would flicker on and off. Advised ATC. Dispatch and maintenance [were] contacted. Emergency authority was used to cycle circuit breakers with Maintenance guidance. The systems were restored.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.