Piper PA-31T Cheyenne

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

Development
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. The PA-31T led to the development of the PA-42 Cheyenne III and IV.

Military operators

 * undefined
 * Mauritanian Air Force
 * United States Department of Defense.
 * United States Department of Defense.

Variants

 * PA-31T Cheyenne: Initial production version, powered by two 620-shp (462-kW) Pratt & Whitney Canada PT6A-28 turboprop engines.
 * PA-31T-1: Original designation of the PT-31T Cheyenne I. Powered by 500-shp (373-kW) Pratt & Whitney Canada PT6A-II turboprop engines.
 * PA-31T Cheyenne II: Improved version, renamed version of original powered by two 620-shp (462-kW) Pratt & Whitney Canada PT6A-28 turboprop engines.
 * PA-31T2 Cheyenne IIXL: Stretched version, powered by two 750-shp (559-kW) Pratt & Whitney Canada PT6A-135 turboprop engines.