After starting from a cold and dark cockpit the push back sequence start normaly but does not stop when completed. Park brakes are inoperative ?an idea for resolve this pb ? Thanks.

As I recall the last time I experienced this problem it could be disabled by manually press the keycombination for pushback twice !?http://jdtllc.com/images/rcv4bannerbeta.jpgPelle F. S. Liljendal

If you're talking about the pushback that is built in to the PMDG 747 and not the FS pushback try left clicking on the center button on the pushback panel. I've had this problem occur if I've used the pushback function more than once in one FS session and flying the PMDG 747.Owen

Happens to me as well.press Shift P (MS Pushback command) stops it moving back.