Will Fraser -
Am I right in assuming DC-ATE's sequence has to do with pax-ops and a port loading and unloading format, at times with engines turning
Yes. And the sequence I gave was for 'Normal' ops. Obviously, there's always exceptions. I have NEVER seen a sequence of 1, 2, 3, 4, however, as someone stated, except the 'default' Flight Sim way, but I thought we were talking "real" here.