Although marked with the correct registration N55VM, the aircraft shown in the film as the crash aircraft is a Douglas DC-3, not the Convair CV-240 that was actually involved.
In one scene, Artemus lights a "joint", which in 1977 would generally be hand-rolled of short cigarette papers (such as ZigZag) and be cylindrical and/or pointy-ended, but the prop more resembles a blunt (tapered to usually a flat-ended filter-like mouthpiece, to a bulbous and twisted-point lit-end), not in common usage until the 1990s.
Green Lucky Strike packs were long gone by 1977. In fact, Lucky Strike changed their packs from green to white in 1942.
In one scene, a character utters "You Go Girl", a phrase not originated nor in common usage in 1977. (Martin Lawrence is credited for introducing the term on "Martin", which began in 1992).