Think I and alot of other people will go with what Robinson say than engineers. Here is the reply to my email:
I've never heard that one ! According to the R22/R44 MM it is 2,200 hrs. or
twelve years which ever occurs first. The twelve year inspection is just
that an inspection. (R22/R44 MM Sec. 2.600)It in no way changes any of the
times. (with the exception of the rotor blades)
Best Regards
Chris Sennett
RHC Tech Support
Ph. 310.539.0508 x208
Fax 310.539.5198
Email [email protected]