Anyway it failed to latch or the latch failed and the door sprang open flipping the rigger off the tail to land head-first on the concrete.
Waddington, around 1967. The latch attachment bracket rivets sheared and the latch broke free.
Poor chap was a safety equipper actually, not long married and his wife was pregnant. He wasn't wearing a safety harness. I watched the demonstration of the correct way to do the job for the BOI. One chap dropped a tool on purpose, then descended from the safety raiser while still wearing the safety harness - to show how useless it was. Didn't make any difference though, the widow didn't get any compensation. We had a whip round in Engineering Wing, but on the wages we got in those days it wouldn't have amounted to much...
We lost a young rigger the following year, pressure testing the escape trainer. Lord only knows why they'd want us to do that, it was a scrap cockpit section for goodness sake! His fiancee was one of the group who received the body at SHQ, but she didn't know it was him until the paperwork came along. What an awful thing to happen.