During the opening sequence the plane on the ground is a Cessna Citation (N10UC), but in the air it is a Lear Jet 24 (N687LJ) even though the pilot identifies himself as "Citation 10 Uniform Charlie" which would have been correct if it were the same plane that was on the ground.
After the plane explodes, a Bell 206 JetRanger is seen instead of the Lear 24 wreckage and the background is a daylight sky even though they were flying at night.
When Peggy gives Mannix the Newspaper, The Headlines "Ex War Ace Dead" has a secondary Header saying "Mid-Air Explosion" and a tertiary Header that misspells "Wreckage" as "Wreakage."