Boeing 727-100

The Boeing 727-100 is a narrow-body, three-engine commercial jet airliner developed by Boeing in the late 1950s and early 1960s. It was designed to operate from shorter runways at smaller airports, featuring a distinctive rear-engine configuration with all three engines mounted at the tail and a T-tail design. Its high-lift wing system, with triple-slotted flaps, allowed operations from airports inaccessible to earlier jetliners. The 727-100 entered service with Eastern Air Lines and United Air Lines in February 1964, quickly becoming one of the most popular commercial aircraft of its era. It was the first jet to sell more than 1,000 units. The aircraft proved versatile and efficient across a wide range of routes, from dense domestic corridors to thinner regional services. Production of the 727-100 eventually gave way to the stretched 727-200 variant, which offered greater passenger capacity and became even more commercially successful. The -100 variant has been largely retired from major passenger service, with some examples continuing in cargo or charter roles in developing markets.