Yes, it does make you wonder - with the documented admission from 2FTS that documentation (see what I did there) had been destroyed, just what details have been retained?
Could, or did, VGS CO's, especially Syerston based, ever, even out of idle curiosity, have a look at maintenance and repair records?
I can't believe that no one anywhere in the VGS network ever suspected anything, if they didn't, it perhaps highlights the naivety of blindly accepting an aircraft in to your care.
I've always taken particular interest in the maintenance and repair of anything I've flown, both the physical maintenance or repair itself and that the paperwork's in order - if you're flying it you want to make sure everything's in order as much as practicably possible.