Cessna introduced the 340 in 1972 to fill in the slot between the 310 and 414. The goal was to offer an affordable, economic pressurized, cabin class airplane that would entice owners of Barons, Aztecs and 310s to step up. The 340 continues to fill that role today.

The original 340s were powered by 285 HP TSIO-520’s. In 1976, the 340A was introduced. The engine was upgraded to the same 310 HP TSIO-520N that was powering the 414. Most of the early 340s have been upgraded to the higher powered J or N models. In addition, RAM Aircraft offers no less than 3 engine options that boost horsepower to 335 HP per side and include intercoolers. Airplanes with these modifications are the fastest of the cabin class Twin Cessna’s. With one of these engine packages, a 210 knot cruise speed at 20,000 feet burning 35 gph is typical.

Other desirable mods include vortex generators, spoilers and the Sierra R/STOL kit.

While air conditioning was an option on 340s, in most parts of the country, pressurized airplanes need air conditioning. Some aircraft have swapped their factory systems for the electrically powered Keith/JB system.

Known ice certification was offered in 1977 but deice systems were available prior to that.

A total of 1,297 Cessna 340s were built between 1972 and 1984. In 1980, a non-pressurized version of the 340, the 335, was built. Only 65 were produced.

The step-up to a pressurized cabin class airplane is a big one but the payoff is tremendous. The 340 is a highly capable airplane that can serve both as a serious business aircraft or family airplane.