Temsco is actually the STC holder for the - 67 PT6 engine installation in the H model Huey. They have done a huge amount of engineering over the years. I believe they started with the work DynCorp did and bought the STC and continued to refine the design. It is designed for the H model Huey and is installed along with the Helitrade STC ( i think that STC is now owned by Hillsborough Aviation) that puts the 212 main and tail rotor systems on the UH1-H, thus the right side tail rotor on the Huey. The 205A-1 could use the Helitrade STC and also be converted to what people call the 205A1+++. The +++ thing is an industry buzz word to describe the mods done to a 205A1, which is what the aircraft remains. The 205B came new with the 212 main rotor and 212 RH side tail rotor. We have no idea which variant the aircraft the subject of this thread actually is.
In the US the Helitrade STC for the 212 main rotor and tail rotor is not applicable to restricted category UH-1H aircraft. The only converted Hueys are the ones owned and operated by public agencies like Customs and Border Patrol and CAL FIRE ( and some other California fire agencies). Those aircraft, of course are not type certificated and can only be used by public operators. Im not sure how Temsco worked that into part of their engine conversion STC. Of course it might be a Bell 210 of which I think about 4 were built and two or 3 might still be flying but that is unlikley as I believe the only 210 operator is in the US. I suspect there are some pilots who think they've flown one variant but are misled by what someone calls it. The Huey family tree is not an easy one to follow.
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