The proper noun, an aircraft manufacturer, is spelled Boeing.
The onomatopoeia, a sound by a spring, or a bouncing object, is spelled "boing."
The number 737 is "seven hundred thirty-seven." The aircraft, the Boeing 737, is spoken "Boeing seven thirty-seven."
The two ways I can think of are "boing" as in the noise a spring makes, and "Boeing" as in the airplane manufacturer.
The spelling of the number 727 is "seven hundred and twenty-seven."The aircraft (Boeing 727) is pronounced "seven twenty-seven."
Boeing is the founder of Boeing corporation.
Boeing Boeing - 1985 is rated/received certificates of: India:U
The Boeing 747 is manufactured by Boeing Commercial Airplanes.
Boeing is an aircraft company formed by William Boeing
The Boeing Company runs the various divisions of Boeing.
Boeing 777
Boeing 747 is easily the largest. The "Boeing 900" you refer to is probably the Boeing 737-900 series, which is a short-medium ranged airplane.
Boeing Boeing - 1978 TV is rated/received certificates of: Netherlands:AL
Boeing is a main aircraft company, so Boeing flight must be the flight of a plane made by Boeing.