Originally Posted by
Old Boeing Driver
If that is the case, then the GA button would have done nothing at 6,000 feet and no GS capture even if the flaps were not "0".
Thanks for the info.
The maintenance manual and my 767 engineering training notes show no reference to the radio altimeters. Also, the logic for flaps and G/S capture is "or", not "and".
Most references show "flaps out of up" (although I do have one reference which says flaps >1).