"David L. Martel" wrote in message
...
Ivan,

In my experience, The stationary door is screwed to the frame. Usually 2
or 4 screws. Once unscrewed the door may be lifted and the bottom edge
swung clear of the frame's track.

Dave M.

Obviously, when rolling anything over the track while the window is out, it
is advisable to put down a sheet of plywood, particle board, etc, to prevent
bending of the bottom assembly.

Steve