For it to penetrate the fuse then, it had to be a metal 4wd/truck style ratchet strap. Who uses those to secure a prop overnight………….Every strap I’ve ever seen (been in the game 35 yrs now) has been soft, no metal parts, too much risk of damage for the obvious reasons. I’m with you Leadie, perhaps the RAAF should be checking their inventory of these things. Maybe the problem was only discovered once airborne because the old girl wouldn’t pressurise. Or maybe they did use a ‘supercheap special’ and were just asking for it………….