I boarded an international flight (KLM to AMS) once and we taxied out and lined up for takeoff. The pilot then came on and said there was a mechanical issue and we'd have to go back to the gate.
We then sat on the plane for several hours while a crew (replaced|repaired) the APU. It was pretty disconcerting to be sitting there and hearing the drilling and grinding emanating from the hold and reverberating throughout the plane.
This was in 2000, so my memory is a bit vague but I do recall taxing out at one point, pushing up the power and then powering back down and returning to the gate for more work.
When the repairs were finally done, we immediately took off and made it across the Atlantic safely. It was one of the stranger air travel experiences I've had.
I’d suspect a lot of those change and go scenarios are backup/redundancy failure. Probably could have made it on a single, but thank god we have regulations saying hell no.
We then sat on the plane for several hours while a crew (replaced|repaired) the APU. It was pretty disconcerting to be sitting there and hearing the drilling and grinding emanating from the hold and reverberating throughout the plane.
This was in 2000, so my memory is a bit vague but I do recall taxing out at one point, pushing up the power and then powering back down and returning to the gate for more work.
When the repairs were finally done, we immediately took off and made it across the Atlantic safely. It was one of the stranger air travel experiences I've had.