TANKSProtection against Microbiological ContaminationTo avoid deposits in the tanks due to microbiological corrosion, supports for strontium chromate tablets are installed in each tank and in the feeder tank. They serve to drain water from the tanks at any aircraft attitude between 3. TANKSTank Draining The wing lower surface panel is designed so that any water collects in the lowest parts of the tanks where four self closing water drains per tank are installed flush with the panel. Two access doors located on the upper surface at either end of each tank permit access to essential equipment without removing the upper surface panel. TANKSInternal Access The wing upper surface panel, comprised of two sections for each half wing : from RIB0 to RIB13 and from RIB13 to RIB23, can be removed for inspection and internal repair.
#Ata chapter 21 pressure systems full
Two magnetic indicators, located on maintenance panel 702VU, inform the crew of any failure to maintain full level in feeder tank.
A fuel quantity repeater, fuel quantity preselector and two refuel/defuel valve position indicator lights are installed on the REFUELING panel.
#Ata chapter 21 pressure systems manual
Manual magnetic indicators are installed on the wing lower surface and may be used to indicate fuel quantities during refueling. This system consists of float type level sensors. The indicating system also includes a high level safety device in case of overfilling, by automatic closure of the refuel/defuel valves before spillage occurs.įuel Quantity Indicating System A high level detection system doubles the safety offered by the indicator in case of overfilling, by closing the refuel/defuel valves. The quantities are given in digital form on the FUEL QTY indicator located on the upper center instrument panel.
Two overwing refueling caps are also provided.įuel Quantity Indicating System The fuel quantity indicating system informs the crew of the quantity of fuel available in each tank during flight. The controls and indicators associated with this system are grouped on the REFUELING panel located in the right landing gear fairing. The system also serves for defueling of the tanks by suction. The refuel/defuel coupling is located on the leading edge of the right wing. Refuel/Defuel System This system ensures refueling and distribution of fuel between the two tanks via two refuel/defuel valves. The fuel LP valves are closed by action on the ENG FIRE handles described in Chapter 26, Fire Protection.
System controls and indicating are grouped together on the FUEL section of panel 25VU on the overhead panel in the flight compartment. LP Fuel Fire Shut Off Control A fuel shut off system which serves to isolate the engine from the feed line is installed between the tank outlet and the associated engine. The feeder tank is located between RIB4 and RIB5.Ĭrossfeed System A crossfeed system between the two tanks is used : - to feed fuel to both engines from the same tank - to feed fuel to one engine from the opposite tank. A jet pump maintains a constant fuel level in the feeder tank where the electric pump and the engine feed jet pump are installed. The jet pump takes over from the electric pump automatically when the engine is running without any pilot action. an engine feed jet pump which delivers fuel to the engine after starting and during flight. An electric pump which delivers fuel to the engine during engine starting. RIB13 located at the wing break, constitutes an anti-surge baffle.Įngine Feed System Under normal operating conditions, each engine is supplied from the associated tank by a system comprising. Each tank has a capacity of 2866 liters (756.6 US gal.) i.e., 2250 kg (4950 lbs) for a density of 0.785 taking into account a 2% thermal expansion volume. TANKSGeneral Fuel is stored in two integral wing tanks formed by the wing spar box between RIBS4 and 22 with the exception of the center section located above the fuselage. to deliver fuel to the engines for all operating conditions of the aircraft, - to indicate to the crew normal function of the fuel system and any malfunctions which may occur during operation so that appropriate safety measures may be taken. Includes an explanation of the system of zoning and measurement used.GeneralThe aircraft fuel system is designed to provide the following functions : - to control tank refueling and defueling.
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