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Detail Steps/Work Items  Key Items/References 
(3)  Connect two the vent hoses to the adapters on the access panel: S Push the vent hoses onto the adapters on the access panel. S Install the clamps which hold the vent hoses to the adapters on the access panel.  Near the outboard end of the fuel filler assembly. 
(4)  Connect the bonding cable to the fuel filler assembly. 
(5)  Install the access panel on the bottom surface of the wing.  Refer to Section 52-40. 
(6)  Attach the bonding strip to the inboard end of the tank: S Put the bolt up through the bonding tag on the inboard tank. S Move the bonding cable into position on the bolt. S Install the washer and nut onto the bolt. S Tighten the bolt. 
(7)  Connect 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. 
(8)  Install the access panel at the wing root rib: S Put the access panel into position on the studs. S Install the 11 washers and nuts. S Tighten the nuts. 

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AMM

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Detail Steps/Work Items  Key Items/References 
(9)  Install the drain valve: S Install a new O-ring onto the drain valve assembly. S Install the drain valve assembly into the mounting at the bottom of the inboard tank. S Secure the drain valve assembly with lock-wire. S Install the access panel.  Refer to Section 52-40. 
(10)  Install the wing onto the airplane.  Refer to Section 57-10. 
(11)  Refuel the airplane.  Refer to Section 12-10. Look specially for fuel leaks from the tanks assembly which you have installed. 
(12)  Do an engine ground test.  Refer to Section 71-01. 

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Fuel System
AMM

Section 28-20 % Fuel Distribution System - Lycoming Engine
1. General
%  This Section tells you about the fuel distribution system for airplanes with the Lycoming engine
%  installed. The fuel distribution system supplies fuel from the fuel tanks to the engine. This Section tells you about the components and equipment which make the fuel distribution system. These are the components of the fuel distribution system:
) Flexible fuel hoses.
) Fuel selector/shut-off valve.
) Fuel gascolator and filter.
) Electric fuel pump (booster pump).
Refer to Section 28-00 for a general description of the fuel system and for the schematic diagram of the fuel system.
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AMM
AIRCRAFT
Safety Lock
Fuel Selector Control Lever
Connecting Shaft
Selector Valve Operating Head
Flexible Hose from Right Wing
Fuel Selector Valve
Gascolator
Flexible Hose from Left Wing
Electric Fuel Pump
Figure 1: Fuel Distribution System Main Components
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Fuel System
AMM

2. Description
Figure 1 shows the main components of the fuel distribution system for the DA 40.
Two flexible fuel hoses connect the left and right wing fuel tanks to the selector/shut-off valve. The selector/shut-off valve is located in the fuselage, under the cockpit floor. The fuel selector/cut-off valve connects to the gascolator.
　
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