The 757 that was grounded in Fiji a while back was due to a supposed blown engine..torched or whatever.
The problem being that the replacement engine wasn't the right sort... some differences with the fire protection system or similar.
I mean you buy 2 jets, one would've thought you'd get the CORRECT engines as spare parts.
And not too long ago heard on talkback radio was the Min. of Def saying that the P-3 Orion was not designed for ASW Ops!!
I ask ya!