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Please don't hold your breath to long because these type of accidents just aren't happening.Robinsons may well have a design imperfection as you have pointed out but this does not make them unsafe to fly.
On the other hand if I were observing a Robinson doing aerobatics and holding my breath till it crashed, I would feel quite safe.
It would be interesting to know what the A/c was doing and what attitude it was in when it failed/crashed.If you are able to find this out please let us know.
I can well understand Frank Robinsons actions in covering his arse.In this day and age people are sueing for millions just because they find a tiny cockroach in their burger.When an A/c crashes and somebody is killed a scapegoat must be found. Somebody must alway's take the blame. If all the i's aren't dotted the t's crossed and boxes not ticked conservatively,then Franky baby would probably have a permanent appointment with his defence lawyer.The law is an ass and clever lawyers are skilled at finding loop holes.
I only know of 1 accident involving rotor loss in an R22 in Aust. I can not dispute that another may have occured.
In this particular case in northern WA it was a failure of a main rotor blade.It is well known, and investigators proved by researching job invoices that the owner/operater was not logging correct flight time.In fact some who knew him suggested as much as 50%.This put the total time in service somewhere around the 4000hr mark.(TBO 2200)
If you can enlighten us on the other incidences please do. I would love to know.