The Piper PA-31T Cheyenne is a twin-engine turboprop development of the earlier PA-31P Pressurized Navajo.

Originally, the aircraft was an upgraded version of the Pressurized Navajo equipped with two Pratt & Whitney Canada PT6A-28 turboprop engines.

Later, the aircraft was further refined and developed, including aerodynamic improvements and fuselage extensions.

Data from Jane's All the World's Aircraft 1976–77 [3]General characteristics Performance

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