in indonesia on a surveying trip in the 70's we had been out doing some winching in the huey to give the raaf pilots some tropical experience.
we were winched out and back up on many occasions.
the next morning early the framie was inspecting the structure of the huey.
he was doing the peer up into the tailcone from the aft cockpit.
all was ok and chipper and as he was clipping the inspection port back in place he realised that the torch he used was still on the seat.
how come I could see everything without needing the torch???
it is usually as black as the ace of spades back in there.
off came the panel again.
how come I can see all the rivets???
took a while to work it out.
where the back of the huey fuselage transitions into the tailcone there was a crack that extended so far around the tailcone that there was only about a foot of skin still holding the tailcone in place.
a very fatal accident averted by the sixth sense of a framie.
all RAAF hueys were grounded until checked.