The AH Mk1 is the British equivalent of the AH-64D Apache Longbow, Sixty-seven of the helicopters were assembled in the United Kingdom under license by AgustaWestland, as prime contractor, from kits built by Boeing Rotorcraft Systems in Mesa, the home of Boeing’s Apache production programs. Although the production program ended a few years ago, Boeing continues to support the British Apache program with a small team in the United Kingdom and program-office employees in Mesa who help keep the Apaches maintained and spares flowing.