G650 - Fuel
The _____ pumps are driven by the engine accessory gearbox.
How does fuel flow into the hopper?
How is automatic refueling controlled?
When the intertank valve is opened fuel can gravity flow between the two hopper tanks allowing the tanks to balance.
Before opening the intertank valve Gulfstream recommends to establish a sideslip (i.e., rudder trim in direction of heavy tank)
The purpose of the fuel boost pumps is to deliver fuel to engines and APU at high pressure through various fuel distribution lines.
The fuel boost pumps deliver fuel to engines and APU at relatively low pressure through various fuel distribution lines and shutoff valves
Vent tubes are connected to an empty chamber or plenum which is located at wing tip, just outboard of the fuel tanks. They provide for _____ fuel expansion.
What is the meaning of the red 'Fuel Tank Temperature' CAS message?
When does the color of blue Fuel Crossflow Valve Open message change to amber?
The outboard wing rib and the forward wall have baffles directing fuel into the hopper, and drain holes for residual fluids. During a max power lightweight takeoff, the hopper is partially depleted during climbout until the aircraft reaches _____
The climbout in this scenario lasts approximately 5 minutes, and the hopper is depleted by 15%.) When the aircraft exceeds 25,000 ft or throttles are reduced, the hopper will steadily replenish to its 100% value. The hopper will remain full if the aircraft is in straight and level flight at any altitude because engine consumption in straight and level flight does not exceed ejector pump supply.
There is only one method for maintaining fuel balance: directing fuel from one hopper to opposite engine using crossflow valve.
There are two methods: by moving fuel from hopper to hopper through intertank valve, or by directing fuel from one hopper to opposite engine using crossflow valve.
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Each wing contains a surge tank where fuel entering the vent system is caught and drawn back into the main tank.
APU fuel is normally supplied by:
When FUEL RETURN switch is selected to AUTO OFF caption extinguishes and the system allows heated fuel into the tanks when fuel tank temperature is approximately _____
When tank temperatures warm to approximately +10 deg.C (50 deg.F),heated fuel stops flowing to the tanks.
The G650 has _____ boost pumps.
There are four identical and interchangeable fuel boost pumps in the main wheel wells attached to aft portion of each hopper.
All operable boost pumps shall be ON for all phases of flight unless fuel balancing is in progress.
The purpose of the fuel ventilation system is to protect from over and under pressurization by allowing air, fuel vapors, and fuel to move about or flow freely.
The ventilation system also provides a secondary function for the fuel tank. If a fueling malfunction overfills the tank, the pressure of the increasing volume of fuel will overcome the hinge action of the vent / float valves forcing them open. Fuel will then flow into a spring-loaded pressure relief valve and out the vent tubes to the plenum chamber. If fuel continues to over-pressurize the tank, the plenum will fill with fuel and then spill out of the ram air inlet in the wing leading edge, providing a relief from the overpressure and preventing structural damage to the wing tank.
The low fuel level alert is displayed at 650 lbs (96 gallons).
Over-Wing (Gravity) Fueling System - Both wing tanks should be filled simultaneously. If both tanks cannot be filled at the same time, fueling should alternate from wing tank to wing tank to avoid the maximum fuel imbalance limit of _____ pounds.
The hopper tanks are inside each wing tank, adjacent to centerline rib. A hopper holds approximately _____ of fuel.
Each hopper contains up to 190 U.S. gallons or 1,283 pounds of fuel (719 liters or 583 kilograms). Each wing tank has an internal compartment at the wing root, termed a hopper, at the center aft portion of each tank. The hopper is fed from the main wing tank by an ejector pump.
Two vent stringers are part of the wing structures. These stringers are designed to run from the vent plenum to the outboard portion of the wing, providing an air entry path and fuel exit path during overpressure conditions.
These stringers are designed to run from the vent plenum to the inboard portion of the wing, providing an air entry path and fuel exit path during overpressure conditions.
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When fuel tank temp. is at or below _____ in flight with less than 5,000 lb. total fuel remaining, the aircraft shall be descended to an altitude where SAT is -60 deg.C or warmer and maintain a minimum speed of 0.80M.
The G650 and the G650ER have a different maximum fuel capacity. It differs from approximately:
The G650 has a maximum fuel capacity of 44,200 lb / 6,558 gal / 24,822 L and the G650 offers 48,200 lb 7,152 gal 27,068 L.
What is indicated if the red light illuminates on refuel panel?
What happens when REMOTE FUELING SHUTOFF switch is selected to CLSD?
Each wing tank is equipped with four drain valves located in the lower skin of each wing.
Each wing tank is equipped with three drain valves located in the lower skin of each wing. Drain valves are provided for each tank: one in the main portion of the wing tank, one in each hopper, and one in each vent plenum.