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% A short flexible coupling attaches the fuel filler assembly to the outer face of the fuel tank. Two worm-% drive clamps at each end hold the flexible coupling to the tank and the fuel filler assembly. Two small % diameter flexible hoses connect the vent adapters at the top of the tank to the two inboard adapters % on the fuel filler flange.
% A bleed type check valve is screwed into one of the two outer adapters on the filler flange. A short % flexible hose connects the bleed type check valve to an adapter in the outer fuel tank access panel in % the bottom surface of the wing.
% A second short flexible hose connects to the other outer adapter on the fuel filler flange. It has a % restrictor (right wing) or relief valve (left wing) in it. It connects to an adapter in the outer fuel tank % access panel in the bottom surface of the wing.
% Bonding strips connect the tank to the fuel filler assembly and the airplane bonding system.
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% Trouble-Shooting % 1. General
% The table below lists the defects you could have with the fuel storage system. If you have the trouble % detailed in the Trouble column read across to the Possible Cause column. Then do the repair given % in the Repair column.
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Trouble  Possible Cause  Repair 
Filler cap leaking.  Filler cap gasket damaged. Filler cap does not have a tight fit.  Replace filler cap gasket. Tighten nut on lower side of cap. 
Fuel drain valve leaking.  Drain valve damaged. Contamination in drain valve.  Replace fuel drain valve. Open and close drain valve. Do this until the drain seals. If the drain does not seal then replace the drain valve. 

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% Maintenance Practices % 1. General
% These maintenance practices tell you how to remove/install the fuel tanks. Obey the safety precautions % for fuel at all times.
% WARNING: DO NOT GET FUEL ON YOU. FUEL CAN CAUSE SKIN DISEASE.
% WARNING: DO NOT ALLOW FIRE NEAR FUEL. FUEL BURNS AND CAN CAUSE % INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
% WARNING: DO NOT BREATH FUEL VAPOR. FUEL VAPOR CAN MAKE YOU ILL.
% 2. Remove/Disassemble the Fuel Tank Assembly
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% A. Remove the Fuel Tank Assembly

Detail Steps/Work Items  Key Items/References 
(1)  Remove the wing which has the fuel tanks that you will remove and support the wing on trestles.  Refer to Section 57-10. 
(2)  Remove these access panels from the wing: S Remove the access panel from the root rib: S Remove the 11 nuts and washers from the studs. S Pull the access panel from the studs and clear of the airplane. S Remove the access panel for the fuel drain valve.  Refer to Section 52-40. 
(3)  Remove the fuel drain valve: S Cut the lock-wire. S Remove the drain valve from its mounting.  Refer to Figure 2. 
(4)  Disconnect these electrical connectors: S Fuel quantity probe. S Low fuel sensor. S High fuel sensor (left wing only). S Fuel temperature sensor.  At the inboard end of the tank. At the in-line connector. 

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