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Closing the fuel shut-off valve, located either on the aft side of the firewall or at the maintenance drain manifold, will cause the engine to stop within a few seconds.
A return line from the mechanical pump's fuel vapor separator returns vapor and excess fuel to the tank.
Fuel pressure is measured at the fuel distribution manifold and displayed on the fuel pressure indicator, which is calibrated in PSI.
Some DA20-C1 aircraft also have a fuel vapor separator in the distribution manifold. These aircraft have a second vapor return line from the distribution manifold to the firewall.
Figure 7.6. Fuel System Schematic Diagram 7.10.1. Fuel Shut-off Valve
WARNING
THE FUEL SHUT-OFF VALVE SHOULD ONLY BE CLOSED FOR EMERGENCIES OR FUEL SYSTEM MAINTENANCE.
There are two different versions of fuel shut-off valves in the DA20-C1.
Version 1
The fuel shut-off valve is located on the cabin side of the firewall and is controlled by a handle on the right side center pedestal. To activate the fuel shutoff valve, lift the handle release lock and pull the handle out. In the open position the knob is in. In the closed position the knob is out.
Version 2
The fuel shut-off valve is integral to the maintenance drain manifold, located below the fuel tank. It is actuated by the center console mounted rotary lever, via a rigid pushrod. To activate the valve, rotate the lever clockwise from OFF to ON or lift the lockout knob and rotate the lever counterclockwise from ON to OFF. The safety lockout knob prevents accidental actuation of the valve.
7.10.2. Tank Drain
To drain the tank sump, activate the spring loaded drain by pushing the brass tube in with a drain container. The brass tube protrudes approximately 1 1/6 in (30 mm) from the fuselage contour and is located on the left side of the fuselage, approximately at the same station as the fuel filler cap.
7.10.3. Fuel Filter Bowl
The fuel filter bowl is between the tank and the fuel pump. The bowl acts as a trap for sediment and water that has entered the fuel line from the tank.
7.10.4. Fuel Filter Bowl Drain
The filter bowl drain is next to the fuel tank drain. It operates in the same manner as the fuel tank drain.
7.10.5. Fuel Dipstick
A fuel dipstick, P/N 22-2550-14-00, is supplied with all aircraft to permit direct measurement of fuel level during the preflight check. On serial numbers C0056, C0066, C0067 and C0069 use fuel dipstick P/N 22-2550-17-00.
NOTE
Electric fuel gauges may malfunction. Check fuel quantity with fuel dipstick before each flight.
To check the fuel level:
1.
Insert the graduated end of the fuel dipstick into the tank through the fuel filler opening until the dipstick touches the bottom.
2.
Withdraw the dipstick from the fuel tank.
3.
Read fuel quantity. The dipstick is calibrated in increments of 1/4 of useable fuel capacity. (21.3 US gallons/80.5 liters for Type 1 Fuel System or 24.0 US gallons/91 liters for Type 2 Fuel System).
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