An engine which goes 'Bnag' may be viewed by some as engineering Gold LOL...
Personally I would describe it as being more like engineering Brown and as I posted earlier - any fix is likely to add weight to the engine - not a huge problem for most combat aircraft but for the Turkey 'B' it could well be a wee problem !!
Not sure if that counts as 'Armwaving' but to paraphrase a famous advert - ''there could be trouble ahead'' and one way or the other you can be sure that the taxpayer will pick up the tab as usual !
rgds LR