Originally Posted by
tcook052

A JM-plated ticket won't earn any FFM on Aeroplan even if it is AC metal. JM codeshare on AC metal, no AP miles.
Why not?
As per the
info on Aeroplan.com:
Eligible flights
Most scheduled flights operated by Air Canada as well as Air Canada code-share flights operated by Air Creebec, Air Georgian Limited (doing business as Air Alliance), Central Mountain Air, and Exploits Valley Air Services LTD are eligible for mileage accumulation. Please refer to the terms and conditions at the bottom of the page for Air Canada code-share flights operated by other carriers.
Charter flights on Air Canada Vacations are eligible for mileage accumulation.
Charter flights on Air Canada Jetz are not eligible for mileage accumulation.
Reward travel flights, travel industry discounted tickets, infant tickets or promotional tickets are not eligible for mileage accumulation.
Clearly, the flight will be
operated by AC. When the OP checks-in with AC, their AC PNR will reflect an AC flight number. Their AC-issued boarding pass will also reflect an AC flight number.