The ATR 72-100 is the original stretched version of the ATR concept, created to meet airline demand for higher capacity while keeping the same efficient turboprop design. It entered service in 1989 and typically seats between 68 and 72 passengers, almost 30 more than the ATR 42.
Powered by Pratt & Whitney Canada PW124 engines, the ATR 72-100 offers similar cruise speeds to the ATR 42 but with increased payload capability. It was designed for short to medium regional routes and quickly became popular with airlines looking to reduce operating costs compared to regional jets or larger turboprops.
The cockpit and systems are similar to early ATR 42 variants, using mostly conventional instruments. While most ATR 72-100 aircraft have now been retired from passenger service, many continue to fly after being converted into cargo aircraft or used for charter and utility roles.