B737-300Model: For standard type, airframe is compared 200 model lengthen2.64 meters(lengthen of the airframe before wing1.12 meters, lengthen of the airframe after wing1.52 meters, in all lengthen2.64 meters) , this type began formally to develop in March 1981, general assembly begins in 1983, the first archetypal machine left factory in January 1984, of the same age on Feburary 24 first test-fly, On November 28First consign is used