Airborne early warning (AEW) helicopter for the US Navy fitted with AN/APS-20E radar. Two built. List of Operators of HR2S-1W Global Distribution of HR2S-1W 2hr2s-1w Construction Numbers Displaying only US Navy - Display All C/N Year History 56-015 1957 141646 56-021 w/o 1957 1957 141647