In a similar vein the USAF were removing a Gate Guardian to refurbish it after about 20 ish years on the gate and when the guy climbed in to man the brakes the seat fired killing him… There was a sudden rush the world over including the UK to check Gate Guardians and several were found to still have live seats and canopy systems… Apparently it had flown in, retired and been dragged onto the gate without anyone thinking about the seats etc.