The aircraft AFM normally has Autopilot limitations listed. Can you tell me what they are for the 767Maximum speed for Autopilot Operation Vmo/MmoMinimum speed for Autopilot OperationAutopilot Minimum Engage HeightAutopilot Disengage HeightMaximum Demonstrated Altitude Loss for Coupled Go-Around.Regards,Cliff Scott

Can I answer or do you only want HPSOV?Maximum speed for Autopilot Operation Vmo/Mmo-It is certified to the aircraft's Vmo/Mmo (360/0.86)Minimum speed for Autopilot Operation-Not specified in limitations manual, but technically the incipent stall when the crew are required to take over.Autopilot Minimum Engage Height / Autopilot Disengage Height200' on takeoff500' enroute50' below MDA for a NPA50' above the threshold except for AutolandMaximum Demonstrated Altitude Loss for Coupled Go-AroundMissed approach altitude and height lost:From 50-100'AGL=39'40'AGL=29'30'AGL=23'20'AGL=15'10'AGL=9'5'AGL=5'Cheers.

Are we talking about airline operation limitations here, Cliff... or aircraft system limitations?If we're talking about aircraft system limitations, then it depends on quite a number of factors. For example, MCP mode selections, thrust limits, Air Data Computer Vmo/Mmo programmed limits, flap speed limits, aerodynamics, AOA, etc....There doesn't seem to be too much in the way of altitude limitations. The Autopilot can be engaged from zero feet to 50,000+. The autopilot can be engaged on the ground in basic modes (on our aircraft at least) but it isn't normal to do this in normal ops (other than during an autoland... in which case it will remain engaged until the end of the runway... or further if you forget to brake :-hah ). The MCP altitude selection is limited to 50,000', but you can exceed this altitude in V/S mode. Some autopilot modes have less limit protection than others. For example, V/S mode has no min/max speed limits. If you select V/S mode and select -8000fps on your MCP, the aircraft will build up speed until it overspeeds. Overspeed alarms will sound, but the A/P will probably only disengage itself when the aircraft can no longer follow commands (as a result of airframe damage from that overspeed). You can also dial in +6000fpm and stall the aircraft in climb. Other modes, however, have stall and overspeed protection.Hope this helps?Cheers.Ian.

What he said :-)

Can I answer or do you only want HPSOV?Anthony,Thanks for the information. It is exactly what I neededRegards,Cliff

>Are we talking about airline operation limitations here, >Cliff... or aircraft system limitations? Hi Ian,What I was looking for was the information derived from flight testing during the certification process. I do not have an Aircraft Flight Manual for the 767 so you are invaluable when it comes to ops and limitation requirements on the aircraft. I appreciate your response and Anthony's in regards to my request.Regards,CliffP.S.I would have responded sooner but with work and flying had little time.