. . "The PA-23 was Piper's first twin engine aircraft. The first prototype, known as the Twin Stinson, flew on March 2, 1952. Production of the aircraft began in 1954, as a 4-5 seater version then known as the Apache. The cabin was later enlarged to hold 6 seats, at which point it became known as the Aztec. Production continued until 1981, at which point almost 7,000 had been produced. The PA-23 was a popular business aircraft, and also saw use in recreational aviation and by various militaries as the U-11."@en . . "Piper PA-23"@en . . . "The PA-23 was Piper's first twin engine aircraft. The first prototype, known as the Twin Stinson, flew on March 2, 1952. Production of the aircraft began in 1954, as a 4-5 seater version then known as the Apache. The cabin was later enlarged to hold 6 seats, at which point it became known as the Aztec. Production continued until 1981, at which point almost 7,000 had been produced. The PA-23 was a popular business aircraft, and also saw use in recreational aviation and by various militaries as the U-11."@en . . .