Because it was Air Seychelles long range jet, it was always very busy, very late, and always needing some fixing...
On the return flight, the APU was not working, it was terribly hot inside, so the Captain had to turn on 1 of the engines, and refuel!
Later, they bought some more planes, and the situation got better...
But the B-767, what a delight and confort to fly in!!!!
Such a pity Aviation got much much worse instead of better...