MOHAMMAD FAQIH DINIE BIN MOHAMAD ALI (1507016) FUEL SYSTEM B747 2AERO1 HAZZIQ BIN ABBAS ALI (1507001) MUHAMMAD HAZRUL HAFIZ BIN ITHNIN (1507003) NOR AFZANIZA BINTI ABDUL WAHAB (1507020) MOHAMMAD FAQIH DINIE BIN MOHAMAD ALI (1507016)

INTRODUCTION The Boeing 747 is a wide-body commercial jet airliner and cargo aircraft, often referred to by its original nickname, Jumbo Jet, or Queen of the Skies. The four-engine 747 uses a double deck configuration for part of its length. It is available in passenger, freighter and other versions. Featuring only four engines, the design also required new engine designs with greatly increased power and better fuel economy.  Increased maximum takeoff weight allows aircraft to carry more fuel and have longer range.

FUEL SYSTEM Engine can draw fuel from any fuel tank, fuel can only be suction fed from the main wings tanks. Each main tank and stab tank has AC boost pump + inboard main tanks and center wing tank have override/jettison AC pump.  Center tank has a scavenge pump that will automaticly transfer fuel to main tank 2 if center tank fuel pumps detect low pressure. A vented surge tank is located near the tip of each wing and provide positive pressure on fuel tanks during cruise. Each reserve tank has two automatic transfer valves that alow gravity transfering of fuel to inboard tank when inboard tank fuel quantity decreases below 40,000 lbs.  Outboard main tanks have each one manual transfer valve that allow fuel (7,000 lbs remain in each outboard tank) to be gravity transfered to inboard tank. Valves open automaticaly durring jettison if inboard tank fuel quantity decreases below 20,000 lbs. When center wing fuel tank quantity decreases below 80,000 lbs fuel will be transfered from stab tank. APU drives fuel from main tank 2 that also has DC boost pump.