In the cruise phase, you should see a Top of Descent (TOD or T/D) point (on the navigation screen and in the 'progress' window of the FMC), which marks the beginning of the Descent phase. If the FMC is showing a cruise altitude of 30,000 ft, and the MCP altitude is set to 40,000, the plane should climb until 30,000 and then level off. In the first part of your question, you are talking about climb.

We need to distinguish between climb, cruise and descent. In the beginning of my flight if I set the manual altitude to 40,000 feet and the FMC is set to 30,000 feet for a particular leg will it climb to 30,000 or will my manual setting override that and the plane will climb to 40,000? In other words does the FMC ONLY descend and ONLY if your current altitude is in range? Exceeds 1600W and 400KB weight limit (yours 1.33MB). Should't the plane be descending to 14,149 feet? I thought the MCP/FMS was supposed to descend for me? I am in the final approach and I am supposed to be descending. my autopilot setting is 30000 feet and the plane is holding at 30,000. Right now my current leg is MZB and the altitude in the MCP is 14,000 feet. It should not go below the altitude set in the MCP altitude window, no matter what altitude is set in the FMC.īut if one of my waypoints in my route has an altitude set of say 20,000 and I set my autopilot to 30,000 shouldn't it only climb to 20,000 while it is on that waypoint? When you get it right, you will see the engines spool up to max climb power and the leftmost entry on the PFD change from speed to thrust, I believe. To climb further, you need to increase the altitude and possibly do something else, such as click on the center of the altitude setting dial. Your altitude is set at 20,000, and the aircraft is holding at that altitude, so it is behaving normally.

This is so that if ATC restricts you to a certain altitude, the aircraft won't go above that altitude. In a climb, the aircraft should never climb above the altitude set in the MCP (autopilot) altitude window, no matter what altitude the FMC is set for at the next waypoint. I don't have the X-Plane version of the 777, but I'm familiar with several others.

The only way I can get the plane to climb or defend to the right altitude is to manually set it on the altitude control of the autopilot. I am having some issues learning how to get the VNAV to work with the FMC and the flight director/autopilot.Įverything is working perfectly except it is not auto controlling the vertical altitude even though I can see all of the flight levels in the FMC.

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