Aircraft overview

The Cessna 425 Conquest I is a pressurized twin turboprop produced by Cessna from 1980 to 1986, following development from the pressurized 400 series piston twins. It was originally introduced as the Corsair, then marketed as the Conquest I to align it with Cessna’s larger Conquest family. The aircraft sits in the owner flown and light corporate turboprop category, bridging the gap between high performance piston twins and larger cabin class turboprops. Its importance in the used market comes from that balance: turbine reliability, pressurization, manageable size and operating economics closer to an upgraded piston twin than to larger twin turboprops.

Performance & specifications

Power comes from two Pratt & Whitney Canada PT6A-112 turboprop engines, each rated at 450 shp, driving three blade constant speed propellers. Typical cruise performance is in the mid 240 knot range, with many operators planning about 240 to 250 knots depending on altitude, weight and engine settings. Published maximum operating altitude is 30,000 feet. Range is commonly cited at roughly 1,200 to 1,300 nautical miles with reserves, subject to payload and fuel planning. Useful load varies by equipment and empty weight, but many aircraft fall in the approximate 2,500 to 2,800 pound range. The combination of pressurization, deicing equipment and turbine power makes the Cessna 425 Conquest I suitable for regional business travel, family transport and owner operated IFR missions.

Cabin & avionics

The cabin typically seats six to eight occupants, including crew, with club seating often fitted in the passenger compartment. The fuselage is compact compared with larger cabin class turboprops, but it offers a pressurized environment, an airstair entry door and a useful baggage arrangement for short to medium stage lengths. Factory avionics were period Collins or Bendix King suites rather than modern integrated systems such as Garmin Perspective or Garmin G1000. On the used market, many aircraft have been updated with Garmin GTN or GNS navigators, Garmin G600 or similar flight displays, digital transponders, weather equipment and modern audio panels. Autopilot condition and integration quality are important review points.

Buying & value

Prospective buyers should distinguish the Cessna 425 Conquest I from the larger Cessna 441 Conquest II, which uses different engines, systems and performance assumptions. Pre purchase review should focus on engine times and trend data, propeller status, pressurization performance, deice systems, fuel system condition, landing gear maintenance, corrosion history and the quality of avionics modifications. The main model is the 425, with market differences driven more by engine condition, equipment, interior, paint and maintenance pedigree than by formal variants. In value terms, the Cessna 425 Conquest I is usually positioned as an entry level pressurized twin turboprop, attractive to buyers seeking turbine capability without moving into the cost structure of larger King Air or Conquest II class aircraft.