From The Internet Movie Plane Database
Clint Eastwood (Ben Shockley)
Sondra Locke (Gus Mally)
Pat Hingle (Meynard Josephson)
William Prince (Commissioner Edgar Blakelock)
Bill McKinney (Constable)
Michael Cavanaugh (John Feyderspiel)
A hard but mediocre cop is assigned to escort a prostitute into custody from Las Vegas to Phoenix, so that she can testify in a mob trial. But a lot of people are literally betting that they won't make it into town alive.
Banana yellow DC-9 of Hughes Airwest, airline company which was purchased by Republic Airlines in the late 70’s, and that will merge to Northwest Airlines in the mid 80’s.
Used by a mob sniper to come after Shockley and Gus on their motorcycle. Flies into some powerlines. Registration N341AH, Serial 1032.
Same aircraft in other movies at IMPDb: Frequently Seen Aircraft.
In a continuity error, the sniper's Gazelle casts a shadow of a Bell 206 in one shot. Likely, this was the camera crew's helicopter.