The AgustaWestland AW139, now known as the Leonardo AW139, is a 15seat mediumsized twinengined helicopter developed and produced by the Italian helicopter manufacturer AgustaWestland, now part of Leonardo. It is marketed at several different roles, including VIP/corporate transport, military use, offshore transport, firefighting, law enforcement, search and rescue, emergency medical service, disaster relief, and maritime patrol.[2]

The AW139 was designed jointly by the Italian helicopter manufacturer Agusta and the American company Bell Helicopters. It was marketed as the AgustaBell 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 involved in the programme, such as the Polish manufacturer PZLŚwidnik, which has produced hundreds of AW139 airframes, and HeliVert, a joint venture between AgustaWestland and Russian Helicopters, which has established a production line inside Russia for the type. Having performed its maiden flight on 3 February 2001, the AW139 entered revenue service in 2003 and quickly proved itself to be a commercial success.