The Agusta Westland AW109 is a lightweight, twin-engine, eight-seat multi-purpose helicopter designed and initially produced by the Italian rotorcraft manufacturer Agusta.
It was the first all-Italian helicopter to be mass-produced. Its production has been continued by Agusta's successor companies, presently Leonardo S.p.A. The AW 109 has been used in a wide variety of roles, including light utility, VIP transport, aeromedical, law enforcement, search and rescue (SAR). Several models with alternative engines, expanded fuselages, and alternative equipment fitouts have been produced. Some AW109s feature an convertible interior to quickly adapt the rotorcraft between roles.
The AW109 has been in continuous production for 40 years. The AgustaWestland AW119 is a derivative of the AW109, the principal difference being that it is powered by a single engine.