Boeing 747 is a four-engine long-range passenger plane developed by Boeing Company of the United States, and it is the largest civil passenger plane in the world. 1In August, 1965, Boeing began to develop a 500-seat large wide-body passenger plane to meet the increasing demand of civil aviation passengers in the late 1960s. The first Boeing 747 was delivered on1September 30th, 968. By March 30th,1992,31,all Boeing 747*** orders 1 168. The cruising altitude of Boeing 747 is 13700 meters, the maximum fuel load is 134 tons, the commercial load is 90 tons, the maximum Mach number is 0.88M, and the range is 13000KM. It is widely used by international airlines all over the world for overseas routes. Since the first flight of 1969, Boeing 747 has become a big mobile phone in aircraft: it has a huge fuselage, four powerful turbofan engines, a longer flight distance and passenger capacity, which is unmatched by other commercial aircraft, even today.