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DD:
Looking through the paperwork that I have from 78C, it appears that there is a way to actually certify the RR TSIO 360's for use on US registered aircraft.
On 9-18-1989, Continental issued a Service Bulletin (M89-20) titled Conversion of Rolls Royce Engines. The SB describes how the RR nameplates can be replaced by Continental nameplates.
While the Bulletin was rescinded on 12-15-1989 due to FAA objections outlined in a letter signed by the Manager of the Engine Directorate New England Region, the issue was brought to the attention of FAA national shortly thereafter. On July 6 1990, the FAA (AIR-1 Director of Aircraft Certification) issued an Action Notice (A8110.21) titled Acceptance Procedures for Rolls Royce/Continental Model TSIO 360 Series Engines.
The AN explains how the engines can be approved on an engine by engine basis: provide the initial UK CAA Approved Certification/Dispatch Instruction" which was issued with each new engine and then have the engine inspected by an IA or a Repair Station which can then sign the installation off.
Overall, there were 40 RR engines imported into the US.
So the AN provides a path of a RR engine to be approved in the US. That still leaves Canada.
The US and Transport Canada have reciprocal certification agreements in place and a particular engine approved by the US FAA should be allowed by Transport Canada on the basis of reciprocity.
Hopefully this is helpful. I am happy to provide copies of that documentation if interested.
Richard
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