As a DAR, I haven’t really researched if there is a “prohibition” on bringing an OM Aircraft from Canada to the US. That said, you have to realize how the import/export works. If it is an aircraft that ever had a US standard certificate, or a US Export certificate, there is no export required from Canada. The airplane is simply “coming home”. On the other hand if the airplane was manufactured someplace other than the US, or never had a US Standard or Export, then it would require an Export Certificate from Canada, which they won’t do.
Now, hypothetically, if an OM Aircraft were presented to me for inspection for a Standard, you would likely need to have the engine, propeller, all the instruments, all the avionics, and any component that has mandatory overhaul requirements overhauled. Any “modifications” or repairs that were done while OM would likely need to be removed. The “conformity inspection” would likely involve hands on inspection of every nut and bolt in the airplane, every system in the airplane, and may involve significant disassembly (think of things like brake cylinders). Even for something like a Cub, this could run anywhere from $20k to over $100k (think fabric done by the owner). No matter how you look at it, there is no savings for OM when you consider lost resale value.
Again disclaimer: I have not researched even if FAA would allow being an OM Aircraft “back home”.
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