The Twin Commander 840 cabin is normally configured to seat a pilot and five additional passengers in an executive layout. A typical seating arrangement would include an aft bench seat and two additional rear facing seats. An entry door is located on the port side of the fuselage forward of the wing. A small lavatory is positioned forward, opposite the entry door. The Twin Commander 840 is powered by two Garrett AiResearch (now Honeywell) TPE331-5-254K turboprop engines rated at 840 shp, driving three-blade constant speed propellers. The engines are flat rated to 718 shp each and have an inspection interval of 5,400 hours.
The Twin Commander 840 has a range of 1,779 nautical miles. Type in your city or airport identifier for a visual representation of the NBAA IFR Range (NM) for this aircraft.