The Helpful Stacker said:
Or you could say it gives the spanner monkey a 50/50 chance of ordering the right one.
.....but a 100% chance of fitting it!!
JFZ90.. Thanks for that link. However, it doesn't make clear whether or not the engines are interchangeable. As Topbunker says, is it a cunning propellor gearbox function or have Airbus designed the ultimate Murphy?