The Rockwell Commander 112 is an American four-seat single-engined general aviation aircraft designed and built by North American Rockwell (later Rockwell International) starting in 1972. In 1976, they introduced the turbocharged version 112TC and mounting a larger engine with other minor improvements they introduced the Rockwell Commander 114. A total of approximately 1,300 examples of all models were produced before the production line shut down in 1980. In 1981 type certificate owner was Gulfstream Aerospace, but it had no interest in single-engine piston production. The rights to the design were sold to Commander Aircraft Company in 1988. They improved the interior and made other upgrades to the Commander 114B series, released in 1992. Approximately 200 examples were produced before they shut down in 2002. Aircraft produced between 2000-2002 were named Commander 115 for commercial purposes. Between 2005 and 2012, the Commander Premier Aircraft Corporation (CPAC) was producing spare parts only. An attempt to begin production was made by CPAC who planned a Commander 115 series, however, as of 2016, financial issues had delayed production indefinitely. The total number of all airframes produced under Commander name was approximately 1490 examples (111:2, 112:803, 114:501+154, 115:30). The 112 and 114 are conventional layout monoplanes with the main wing set low and a mid-mounted horizontal stabilizer. This places the stabilizer outside the prop wash, and results in heavier handling at lower speeds. The cabin is 47 inches (1,200 mm) wide and 49 inches (1,200 mm) high, compared to a contemporary aircraft like the Piper Arrow at 41 inches (1,000 mm) by 38 inches (970 mm). This was the most spacious cabin of any design of the era. There is a full-sized door on both sides of the aircraft, while most aircraft of this class have a full-sized passenger door on one side and a smaller door for the pilot on the other. The low mounted wing has significant dihedral and features fully faired retractible main landing gear. The gear use the trailing-link design for additional travel and softer "even less-than-perfect" landings. The 112B, 112TC-A and 114A received larger main wheels and disc brakes as part of their upgrades. Early models featured front seat three-point harnesses where the shoulder belt was fixed to the seat itself. This was found to offer too little strength and was replaced with one fixed to the fuselage behind the seat as part of a 1987 Airworthiness Directive (AD). In spite of being designed specifically to avoid fatigue issues, the series has been subject to a number of ADs due to fatigue cracking, both in the main wing and the elevator. For details of development and 11 variants, click here.