B737-300
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Clearance
Flight Crew Returned To Departure Airport; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Diverted; General Maintenance Action
Aircraft
Just after entering Mexico airspace flying level at FL 350. The autopilot kicked off and the flight director disappeared. We lost all functionality of the MCP panel. I decided to return. We requested radar vectors back to US airspace. When in US airspace we advised ATC and got radar vectors. I contacted the company via AIRINC and informed them of our situation; and requested latest weather. Cause unknown. Performed air return.
B737 Captain reported loss of MCP; autopilot and flight director; which resulted in diversion.