B737 flight crew reported the autopilot disengaged twice during cruise flight at FL410. The crew sta...

Attributes
ACN	1719283
Time
Date	202001
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
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	Autoflight System
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 190 Flight Crew Total 4711 Flight Crew Type 4711
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 122 Flight Crew Total 2854 Flight Crew Type 1667
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Clearance

Narrative:

We were at FL410 and the autopilot disengaged. We were able to reengage the autopilot. The autopilot disengaged once again and the flight director biased out of view. We asked ATC for a heading and a lower altitude to leave rvsm airspace. We descended to FL290 and flew assigned headings from ATC. We looked through the QRH for mode control panel failure checklist and could not locate one. The mode control panel remained locked out for the remainder of the flight. We continued the remainder of the flight raw data. We evaluated the weather at ZZZ1 and several other close by airports. The weather was best at ZZZ for raw data. We requested priority handling. We tested the flight attendants. We made pas to the passengers to make them aware of the fire trucks on arrival. The flight continued uneventfully to ZZZ.

Original NASA ASRS Text

Title: B737 flight crew reported the autopilot disengaged twice during cruise flight at FL410. The crew stated they had no QRH procedure for the failure resulting in a diversion.

Narrative: We were at FL410 and the autopilot disengaged. We were able to reengage the autopilot. The autopilot disengaged once again and the flight director biased out of view. We asked ATC for a heading and a lower altitude to leave RVSM airspace. We descended to FL290 and flew assigned headings from ATC. We looked through the QRH for mode control panel failure checklist and could not locate one. The mode control panel remained locked out for the remainder of the flight. We continued the remainder of the flight raw data. We evaluated the weather at ZZZ1 and several other close by airports. The Weather was best at ZZZ for raw data. We requested priority handling. We TESTed the flight attendants. We made PAs to the passengers to make them aware of the fire trucks on arrival. The flight continued uneventfully to ZZZ.

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.