weight of , first certified November 5, 1965. A23-19 (Model 19) Two or four-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-320-E2B, E2C or E3D piston engine, gross weight of , first certified December 9, 1965. A23-24 Four or six-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming IO-360-A2B or A2D, or when equipped with a constant speed propeller a Lycoming IO-360-A1B or A1D piston engine, gross weight of , first certified March 7, 1966. A24 Four or six-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming IO-360-A2B or A2D, or when equipped with a constant speed propeller a Lycoming IO-360-A1B or A1D piston engine, gross weight of , first certified February 5, 1970. 19A Two or four-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-320-E2B, E2C or E3D piston engine, gross weight of , first certified August 31, 1967, approved in the aerobatic category March 12, 1968. M19A Two-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-320-E2B, E2C or E3D piston engine, gross weight of , first certified December 9, 1969, including in the aerobatic category. B19 Two or four-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-320-E2B, E2C or E3D piston engine, gross weight of , first certified February 13, 1970, including in the aerobatic category. B23 Four-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-360-A2G piston engine, gross weight of , first certified December 13, 1967 and in the aerobatic category November 22, 1968. C23 Four-seat light cabin aircraft, fixed tricycle landing gear, powered by a Lycoming O-360-A4G, A2G, A4J or A4K piston engine, gross weight of , first certified February 13, 1970 including in the aerobatic category. A24R Sierra 200 Four or six-seat light cabin aircraft, retractable tricycle landing gear, powered by a Lycoming IO-360-A1B or A1D piston engine, gross weight of , first certified December 23, 1969. B24R Sierra 200 Four or six-seat light cabin aircraft, retractable tricycle landing gear, powered by a Lycoming IO-360-A1B6 piston engine and new propeller variant, gross weight of , first certified June 18, 1973 sold as a 1974 model also had a new larger rear baggage door. C24R Sierra 200 Four or six-seat light cabin aircraft, retractable tricycle landing gear, powered by a Lycoming IO-360-A1B6 piston engine, gross weight of , first certified