Boeing 727 - Air Canada Fleet
I have been attempting to track down the current whereabouts of the Boeing 727 fleet that flew in Air Canada livery. I can account for a total of thirty-nine aircraft deployed in passenger service but I am omitting three aircraft that flew on short term leases for cargo service in the late seventies.
Air Canada took delivery of Fin 401 on September 25, 1974 and deliveries continued in sequence until June 17, 1982 with the arrival of Fin 439. Originally utilized on Rapidair service, the aircraft was also a good fit for Trans border routes from eastern Canada to Florida and Caribbean destinations.
Replaced by the Airbus A320 beginning in 1990, the majority of the aircraft were transferred to FedEx where they became cargo work horses for many more years. Today most of them are stored at Victorville, California with others stored at various airports, most in the United States but one shows in Tianjin China (Fin # 414), where they are used for training purposes. Fin 401 seems to be serving this function in Dayton, Ohio.
Remarkably, I actually found two aircraft that may still be in service with Amerijet International of Miami, Florida. I sent an e-mail to their Customer Service requesting confirmation but have not received a reply. These aircraft were not sold to FedEx but were leased to Air Transat between 1991 and 1994 before being aquired by Amerijet.
Fin 406 original registration C-GAAF is now registered as N495AJ (pictured) has now been in service for 41 years. View at FlightRadar24. 
Fin 412 (pictured in header) original registration C-GAAL is now registered as N395AJ ; I cannot confirm that it is still in service.
Sources: planespotters.net , rzjets.net