Built in 1970 at cost of $15 million, 747 hangar can handle two 747s, L-1011s and six DC-9s

Original Toronto Star caption: Built in 1970 at cost of $15 million, 747 hangar can handle two 747s, L-1011s and six DC-9s. It has two giant bays, each 270 feet wide, 280 feet long and 120 feet high. Doors alone are 80 feet high and 273 feet wide. Mechanics work on L-1011 (left) and 747 (right). Most work for 250 mechanics involves equipment checks and overhauling. Operations are so efficient, mechanics can change a 747 engine in 10 hours. The 747, which is about 230 feet long with 195-foot wingspan, is largest aircraft fo fit into hangar.