Piper PA-31T Cheyenne

The Cheyenne, Piper's pressurised twin turboprop built on the Navajo airframe, 1974-1984: the PA-31T Cheyenne (renamed Cheyenne II in 1978) with 620 shp PT6A-28s, the lower-powered Cheyenne I (PA-31T1), the stretched Cheyenne IIXL (PA-31T2) and the unpressurised T-1040 commuter (PA-31T3) that mated the Chieftain fuselage to the Cheyenne I wing and engines.

The variants

MODEL	YEARS	ACTIVE	TAILFAX SCORE	WHAT CHANGED
PA-31T	1974–1984	87	19.4/50	Cheyenne / Cheyenne II: 620 shp PT6A-28
PA-31T1	1978–1984	64	Partial 9/30	Cheyenne I: 500 shp PT6A-11
PA-31T2	1981–1984	24	—	Cheyenne IIXL: stretched, 750 shp PT6A-135
PA-31T3	1982–1984	2	—	T-1040: unpressurised commuter

Family fleet, active

177

FAA registry

NTSB events / 1,000, 10 yrs

56.5

10 events over 177 active aircraft, pooled across the family

Data as of: FAA registry Sep 28 · NTSB Oct 2 · scores Sep 30