First Flight 3 February 2001

AgustaWestland AW139

The AgustaWestland AW139 is a 15-seat medium-sized twin-engined helicopter developed and produced by the Anglo-Italian helicopter manufacturer AgustaWestland (now part of Leonardo). It is marketed at several different roles, including VIP/corporate transport, offshore transport, fire fighting, law enforcement, search and rescue, emergency medical service, disaster relief, and maritime patrol.

The AW139 was originally designed jointly by the Italian helicopter manufacturer Agusta and the American company Bell Helicopters, thus it was marketed as the Agusta-Bell AB139, but was redesignated as the AW139 after Bell withdrew from the project. In addition to AgustaWestland's manufacturing facilities in Italy and the United States, other companies are also involved in the programme, such as the Polish manufacturer PZL-Świdnik, which has produced hundreds of AW139 airframes, and HeliVert, a joint venture between AgustaWestland and Russian Helicopters, which has also established a production line inside Russia for the type. Having performed its maiden flight on 3 February 2001, the AW139 entered revenue service during 2003 and quickly proved itself to be a commercial success.

Many of the AW139 customers have been in the civilian sector; large fleets have been obtained by operators such as CHC Helicopter, Gulf Helicopters, and Weststar Aviation. Its performance has enabled it to become popular amongst operators supporting the offshore oil and gas industry. A dedicated militarised model, the AW139M, was also developed by AgustaWestland; it was first procured by the Italian Air Force, other military operators include the United States Air Force, which operates the MH-139 Grey Wolf model. The Japanese business Mitsui Bussan Aerospace has obtained an exclusive distribution agreement for the AW139 in the country. Over 1,100 rotorcraft had been sold by January 2021. The AW139 has been subsequently developed into the AW149, an enlarged medium-lift military-orientated rotorcraft.

In 1997, the Italian helicopter manufacturer Agusta launched a programme to develop a replacement for the Bell Huey family of helicopters, which had been built in very large numbers by Bell Helicopter and under license by Agusta. A potential market of 900 aircraft was predicted. In 1998, Bell and Agusta entered into an agreement setting up a joint venture, Bell/Agusta Aerospace Company (BAAC), to develop two aircraft: a conventional helicopter and a tiltrotor aircraft. These became the Bell/Agusta AB139 and Bell/Agusta BA609 respectively. Bell was to be the leading partner for the development of the BA609 while Agusta would be the lead partner for the AB139. It was intended for production, sales, and support to be shared.

In September 2000, the first order was placed by Bristow Helicopters. The first preproduction helicopter flew on 3 February 2001 at Vergiate in Italy, with two further AW139s participating in flying trials. The first production AW139 made its first flight on 24 June 2002. European JAA certification was received in June 2003, and its FAA type certificate followed in December 2004. By May 2005, the AW139 had received in excess of 100 orders worldwide. In the US, the type was marketed under the designation US139, and was entered into the US Army's Light Utility Helicopter competition. A key market for the AW139 was the oil and gas industry, which required helicopters of increased endurance for offshore operations. In 2005, AgustaWestland bought out Bell's 25% share in the program and all of its rights to the AW139 for $95 million.

In April 2008, AgustaWestland revealed that it was in the process of certifying an increase in the AW139's max gross weight to 14,991 lb (6,800 kg), to better compete in long-range markets served by helicopters such as the larger Sikorsky S-92 and Eurocopter EC225. In 2007, a second production line at the United States AgustaWestland Aerospace plant in Philadelphia, Pennsylvania was established. The Philadelphia plant produced its 200th AW139 in September 2014, at which point U.S. production was intended to reach 40 units per year in the near future. By 2011, AgustaWestland was producing 90 AW139s per year. 9.5% of the company's overall revenue in 2010 was attributed to the type. By 2013, a combined total of 720 AW139s had been sold to over 200 operators in 60 countries