History The Cheyenne I and IA are essentially turboprop versions of the popular PA31 Navajo and were designated PA31T-500s. They are both powered by two 500 shp PT6A-11s. The IA has redesigned interior cockpit and cabin layouts compared to the Cheyenne I. The company produced 215 Cheyenne I/IAs between 1978 and 1985. The Cheyenne I/IA typically seats five passengers in the cabin. Summary NAME: Cheyenne IA MANUFACTURER: Piper Type: Turboprops RANGE: 653 nm SPEED: 261 kts PASSENGERS: 5 people ACQUISITION COST: $574,891 ENGINES: Pratt & Whitney Canada PT6A-11 2 AVIONICS: WINGSPAN: 42.7 ft IFR CERTIFIED: Yes