Due to its reduced power, this airplane does not require an SAS. The Cheyenne IIXL (PA-31T-2-620XL) is a stretched (by two feet) version of the Cheyenne II. Certified in February 1981 and built until 1984, it does not use SAS.

The Cheyenne IA (PA-31T-1A-500), certified May 1983 and produced until 1985, brought together several design improvements to the basic Cheyenne I.

The PA-42-720 Cheyenne III was announced in September 1977. The first production Cheyenne III flew for the first time on May 18, 1979 and FAA certification was granted in early 1980.

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