In the late 1970s, then perennially penny-pinched Piper Aircraft could not stomach the costs of developing a clean-sheet light jet when that market segment was booming. But it needed an aircraft that could compete head-on with the fast selling Cessna Citation I. So, company engineers elected to hot rod the PA-42-720A Cheyenne III to field a viable challenger. Off came the 720-shp Pratt & Whitney Canada PT6A-61 turboprops, replaced with a pair of 1,000-hp Honeywell TPE331-14 ...

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