The ATR 72-100 is a twin-engine turboprop regional airliner produced by ATR, a joint venture between Airbus and Leonardo. It was first introduced in 1989, as an upgrade of the ATR 42. The ATR 72-100 is a high-wing, twin-engine aircraft with a T-tail, and has a larger fuselage and improved performance compared to the ATR 42.

ATR decided to manufacture the ATR 72-100 due to its improved performance, capacity, and cost-effectiveness. The ATR 72-100 was designed to meet the needs of the regional airline market, providing a combination of short-haul capacity and low operating costs. It can seat up to 78 passengers in a single-class configuration, and is capable of carrying up to 3,500 kg of cargo. The aircraft is highly popular with regional airlines, and is used to provide point-to-point services in a variety of markets worldwide.

Over the years, the ATR 72-100 has had a few issues with safety. In 1997, an ATR 72-100 operated by American Eagle Airlines crashed shortly after take-off, resulting in the death of all 68 passengers and crew on board. The accident was later found to be due to pilot error. In 2002, an ATR 72-100 operated by Air Mandalay crashed in Myanmar, resulting in the death of all 70 passengers and crew on board. The accident was attributed to bad weather.

The ATR 72-100 has been praised for its numerous innovations and new technologies. The aircraft features improved fuel efficiency, an advanced flight deck, and an improved cabin design. It also has a higher thrust-to-weight ratio, allowing for improved climb and cruise performance. Additionally, the ATR 72-100 is one of the first regional aircraft to feature a digital pressurization system, which reduces cabin altitude and improves passenger comfort.

The ATR 72-100 is distinct from other aircraft in its class due to its improved performance and fuel efficiency. It is also one of the only regional aircraft to feature digital pressurization, and its advanced flight deck gives it an edge over its competitors. The aircraft has become one of the most popular regional airliners in the world, and has been praised for its cost-effectiveness and reliability.