The Boeing 737-300 is a twin-engine short-medium range jetliner that the Boeing Company began developing in 1981. For the first time, high bypass ratio CFM56 engines were used to improve fuel efficiency and reduce noise. The 737-400 is a stretched version of the 737-300. With the fuselage 1.8m and 1.2m stretched before and after the wings, the plane can carry more passengers.
Hainan Airlines has 16 737-300 passenger planes and 6 freighters. Seating Configuration: 148 seats economy class or 144 seats economy class
Hainan Airlines has 10 737-400 passenger planes. Seating Configuration: 8 seats first class plus 138 seats economy class.
B737-300 Basic Data:
Overall Length: 33.4m
Tail Height: 11.1m
Wing Span: 28.9m
Cruise Speed: 800km/hr
Maximum Cruising Altitude: 11278m

B737-400 Basic Facts:
Overall Length: 36.4m
Tail Height: 11.1m
Wing Span: 28.9m
Cruise Speed: 800km/hr

Maximum Cruising Altitude: 11278m