Do we have to put up with this absolute drivel?
The APU of a 145 went u/s in IOM recently. The handling agent's airstart unit was also tech.
The solution was a once-only cross-feed from another 145 which had been flown in straight away to keep the schedule running. This worked to get the original aircraft positioned out of IOM for its APU to be replaced. It took four days to source airstart hoses of the right length and get them to IOM, which was apparently faster than waiting for the Menzies ASU to be sorted.
No ATR involvement and the 145 with the tech APU was out of passenger service, with another 145 keeping the schedule on track.
You make it sound like the 145 with the u/s APU was being jump-started from an ATR for every passenger service, which is far removed from the reality.