Originally Posted by
suzy1K
When the plane is waiting to be waved in, if the pilots set the brakes that sends an 'arrival' signal. After they get to the gate and re-set the brakes, the arrival time is re-set then re-sent when the door opens.
That would match exactly what I described above - the arrival time IS (incorrectly) shown as the time when the plane pulls up short of the gate, but then is updated when they actually arrive at the gate.
So the UA website/app show the incorrect time whilst the plane is waiting, but the end result is correct.