Jet Avia Charter Thursday January 6, 1977
The plane took off from Palm Springs Municipal Airport in light rain, bound for Las Vegas Nevada. The plane climbed to 9,000 feet but never changed its runway heading and flew directly into a mountain at an altitude of 9,700 feet. Flight crew's misinterpretation of an IFR clearance issued by the Palm Springs Departure Control and subsequent ATC instructions. Natalie "Dolly" Sinatra, 82, mother of entertainer Frank Sinatra and her traveling companion were killed.