In the 737NG, I enter the flight plan in the FMC. At 1,000 feet I turn on the autopilot and the Lnav and Vnav buttons. The plane will then fly the flight plan course, and climb automatically to the cruise altitude entered in the flight plan in the FMC. However, when the plane reaches the desend point, TD on the map, it wil NOT descend automatically. I must enter the lower altitude in the autopilot.Is the plane supposed to descend automatically based on the altitude entered in the FMC flight plan? If yes, how is this done?Thanks.Stanner

Yes, you must lower the altitude on the MCP to whatever your next waypoint is, or in some cases your IAF. I usually wait until I'm a few miles from TOD then dial in my IAF (Initial Approach Fix) altitude.For more answers please go to PMDG's forum here on Avsim.http://forums.avsim.net/dcboard.php?az=show_topics&forum=136