Regardless of whether the changes prevent civilian operation of bang seat equipped aircraft in the future, the investigation so far has surely prevented the situation where a seat is flown with life expired cartridges.
I think that the seat cartridge 'issue' is a is a major red herring.
The problem with the supply of seat cartridges for vintage jets has been well known for many years, and the continued use of expired cartridges until replacements could be obtained subjected to the professional judgment/risk assessment of the engineers and pilots involved. I know. I was one of them.
The point is, that the risk of operating with expired cartridges, however small that may be,(and I believe it to be very small) is borne entirely by the occupants, and it should not be a factor when assessing the risk to the public.
MJ
