The Boeing 727 passenger jet has three engines.
The 727 is a narrow-body trijet developed by Boeing for short- and medium-range routes. Its three Pratt & Whitney JT8D turbofan engines are mounted at the rear of the fuselage, with two engines on either side of the tail and a third fed through an intake above the fuselage. This arrangement gave the aircraft a distinctive rear-engine profile and a T-shaped tail.
The 727 first flew in 1962 and entered airline service with Eastern Air Lines in 1964. Boeing built two principal passenger versions, the 727-100 and the stretched 727-200. The aircraft’s built-in airstair and strong short-field performance made it useful at airports with less-developed ground infrastructure. The 727 is often confused with the twin-engine 737, but its third rear-mounted engine is one of its defining features.