Earlier in the thread someone commented on how the difference berween Reims built Cessna's and American built is handled.
The Cessna IPC for the C150 lists all serial numbers for both makes and that goes back to at least 1970.
As far as I am aware parts have not been available from Reims for years.
Rumour has it that Cessna are now design authority for the Reims aircraft except the C406.
If anybody can confirm this I would be pleased to have a reference.
This problem with the 206 is by and large artificial generated by bureacrats without much of a clue or interest in the realities of operating aircraft. The CAA just sits in the corner wringing it's hands. They have allowed this situation to develop over a number of years.
I remember in the early nineties a visit from the CAA we were asked about our policy in respect of AD's for AB 206's. Apparently a number of maintenance organisations were certifying to FAA AD's and ignoring the Italian ones. Given Agusta's lack of interest in supporting the 206 this wasn't really a surprise. Service information would be issued by Bell and months later Agusta would get round to issuing a copy under their banner.
The perfect answer would be for Bell to take over design responsibility for the AB206 but given the American legal liability problems and the fact that every 206 that gets decked is a sales opportunity don't hold you breath.
Alternatively EASA could take a pragmatic view and allow Bell parts to be used. Again don't hold your breath.