Responding to market demand, Agusta formed its North American subsidiary, then called Agusta Aviation, in 1981, with headquarters in Houston, TX. Now renamed Agusta Aerospace Corporation (AAC), to reflect its broader role and mission, the company operates out of a multi-million dollar, 75,000 square foot headquarters facility in Philadelphia, PA.

United States, Canadian, South American, and Central American sales, along with service support, are conducted from AAC. Complete support capabilities include: airframe/sheet metal fabrication, components overhaul, parts inventory, routine inspections, pilot and mechanic training, and A109/A119 completions, all provided from the fly-in service hangar located within the headquarters complex.

On October 29, 2004, AgustaWestland opened the expansion to the manufacturing facility of Agusta Aerospace Corporation, to build the A119 Koala helicopter used by civilian and law enforcement customers. This new facility adds a state-of-the-art, 40,000 square foot workspace with assembly, completion and flight-line hangar areas.

About one year later the company has opened another expansion to its facility, which in addition to the AW139 assembly is also responsible for AW119 Ke production and supporting the expanding fleet of AgustaWestland helicopters in North and South America. The company broke ground on this new 110,000 square foot facility in November 2005 and already in December 2006 the first AW139 assembled in Philadelphia was delivered to its customer.

On February 20, 2008, AgustaWestland was pleased to announce the Grand Opening of the new AW139 assembly line in Philadelphia (PA). This second AW139 assembly line in Philadelphia enables AgustaWestland to meet the growing demand for the AW139 medium twin turbine helicopter around the world but with particular focus on the expanding Americas' markets. Just over one year since production started this AW139 assembly line is about to reach full scale production and will be able to produce 30 helicopters per year. By early 2008 employment at the Philadelphia facility had grown to approximately 500 people.

The Philadelphia facility has steadily expanded to become AgustaWestland's third main helicopter final assembly location and continues to be the main product support centre for customers throughout the Americas. Customer support is provided 24 hours per day 7 days per week for a fleet of more than 360 helicopters in the Americas. Moreover, the Philadelphia plant is also devoted to both flight and maintenance training activities.

A large, professional staff is dedicated to the procurement of parts, components, and systems from U.S. and Canadian suppliers. Sources selection, contract administration, in-transit warehousing, and import/export management are all handled under one roof at the Philadelphia facility. A 15,000 square foot warehouse serves as the consolidation point for over $100 million worth of goods annually exported to Italy in support of Agusta production lines.