[Stig Jarlevik]

Sorry, but that makes no sense to me

How on earth would an engine manufacturer know which aircraft their engine(s) would end up into?

Also with the number of engine changes, which must have taken place, I doubt the same engine(s)
went back into the same airframe every time.

Neither can I understand why anyone on a unit level would try and fix an aircraft WNr to the
engine.

Cheers
Stig