Diamond Aircraft DV 20 KATANA, Maintenance Manual

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AIRCRAFT
DV 20 KATANA AMM
Fuel
Doc # 4.02.02
Rev. 13
28-00-00
Page 1
15 Dec 2018
CHAPTER 28-00
FUEL
1. General
The fuel system of the DV KATANA consists of an aluminum fuel tank with a capacity of 79 liters
(20.9 US gal.), a fuel shut off valve, an electrical and a mechanical fuel pump, the carburetors, and the
fuel lines. A sensor is used to monitor the fuel pressure.
2. System Description
The fuel tank is located behind the seats and is vented to the atmosphere.
A fuel line runs from the fuel tank to the electrical fuel pump, located under the tank, and further to the
fuel shut off valve which is located in the center console. The fuel shut off valve has two positions,
OPEN and CLOSED. The fuel line continues to the firewall breach from where it runs to the
mechanical fuel pump which is mounted on the engine. From the pump output port the fuel line
continues to a cross shaped fitting on the firewall. (Note that the cross-shaped fitting mounted on the
ROTAX 912 S3 engine is different to the one used on the 912 A3 engine.) The pressure sensor
(912 A3: orifice in cross-shaped fitting, 912 S3: orifice in sensor) is attached to this fitting. From here
the fuel is finally directed to the carburetors.
A return line runs from the cross shaped fitting through a capillary valve to the fuel tank. If vapor
bubbles occur, they will be removed via the return line.