Built in 1960 as A4D-2N (redesignated A-4C in 1962). Served in the US Navy from 1960 to 1971 with BuNo 145073. Stored at Military Aircraft Storage and Disposition Center (Tuscon, AZ) from 1971 to 1980. Delivered to the RSAF on Dec 16, 1980 and later converted in Singapore to the A-4S-1 and then to A4-SU version. Decomissioned in 2006 and in 2008 placed on display at Republic of Singapore Air Force Museum.