FAR 91.409 involves itself with requiring some sort of special inspection
program for turbine powered rotorcraft. Builders of Amateur Built turbine
powered rotorcraft are being forced to generate some inspection program
documentation to get the airworthiness certificate. Nearly all of these
aircraft use Auxillary Power Unit engints. To my knowledge there are no
component time lives listed by the engine manufacturer for these engines.
This forces the Amateur builder into just fabricating some paper work to
satisfy the 91.409.
With all the "Wisdom" of the FAA, all the two stroke engine installations
did not have any special inspection requirements. Those little buggers have
a terrible reliability history. Evidently the 91.409 is not about engine
reliability since the higher failure frequency of the two strokes has been
ignored.
Gee I wish we had more government intervention helping to keep me safe....