I am sure that we were told about ensuring correct pin placement in the Mk10 decades ago. None of us reported it up the chain as the message was coming to us down the chain. I seem to recall finding a seat pin through the handle only as a trap in the sim one day - not to mention all sorts of sabotage concerning the barostat and the seat top including the scissor shackle area.
Courtney, as I said a few pages ago and I'm glad I'm not the only one. I thought my memory was playing tricks. We were
taught that incorrect placement was possible and this was in the 1980s!
Somehow, over the long operating history of the aircraft the knowledge was lost and it is a tragedy that it has cost someone his life. I'm not sure how you go forward from there, but I sincerely hope there are no other lapses in 'corporate knowledge' awaiting others who fly some of the RAF's more venerable machinery