After flying for Air Canada as a dedicated cargo aircraft since 1979, C-GAGX is pictured undergoing pre-delivery checks before becoming N725PL for Interstate Airlines.

Former United Airlines N7416U was operated by Air Canada for cargo services September 1979 - November 1981. Sold with sister ships C-GAGY and C-GAGZ to ATASCO for lease to Interstate Airlines, this aircraft (N726PL) was subleased in 1984 to Astar Air Cargo. Sold to DHL Airways in April 1987 still operated by Astar, it was re-registered N705DH in 1990. The freighter was withdrawn and stored at Kingman in 2002. It was sold to Aircraft Trading International in 2004 for scrapping.

Every decade or so, it seems that Air Canada tries a different dedicated freighter aircraft. Before this 1967 ex-United Airlines 727 (and two sister ships), there were Bristol Freighters, Vanguards, DC-8s and DC-9s. The 727Fs were in the fleet from 1979 - 1981 and all three aircraft were sold to Interstaes Airlines.