Smudge I seem to remember we could gag an engine on a Ten and carry pax, but I think Maggie came back on one from the States that shut another down, after that we couldn't do 3 engined ferries with Pax..
Hence the she left on a Ten, departed on a Trident and landed in a 1-11.
Yep Beagle, that and none of them had any commonality either, which made life interesting for 216... Ohh and the sliced full size freight containers that could go through a pax door.