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gascolator.
(14) Install the fuel-tank access-panel below the
fuselage.
(15) Install the instrument panel. Refer to Chapter 31-10.
(16) Install the top engine cowling
(17) Do the fuel shut-off valve functional test. Refer to Chapter 28-20.
(18) Bleed the engine fuel system. Refer to Chapter 73-00.
Fuel
DA20-C1 AMM
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Rev. 9
4. Functional Test Of The Fuel Shut-Off Valve
Detail Steps/Work Items Key Items
(1) Do an engine run up test:
− Set the engine to IDLE RPM.
− Set the fuel shut-off valve to OFF.
− Make sure the engine stops.
For the engine run procedures refer to the
DA20-C1 Flight Manual.
(2) Set the fuel shut-off valve to OPEN.
− Restart the engine.
− Make sure the engine operates correctly.
For the engine run procedures refer to the
DA20-C1 Flight Manual.
Refer to the Teledyne Continental
Operators Manual for engine data.
DA20-C1 AMM
Fuel
Doc # DA201-C1
Rev. 9 28-40-00 Page 1
29 Apr 2004
CHAPTER 28-40
INDICATING
1. General
The DA20-C1 has a fuel quantity indicating system. The fuel quantity indicating system has a
resistance-wire sensor. The gauge on the instrument panel measures the current flowing through
the sensor. The gauge is marked 0, 1/4, 1/2, 3/4 and 1/1.
2. Description And Operation
Figure 1 shows the location and installation of the components in the airplane.
The fuel quantity indication system has only 2 components. It has a fuel quantity sensor and a
gauge.
The fuel quantity sensor is a located in the top of the fuel tank. It has a tube which goes close to
the bottom of the fuel tank. The tube protects a float. The float can move up and down on 2
resistance wires. Contacts on the float make a short-circuit between the wires.
Five screws attach the sensor to the top of the fuel tank. A cork gasket makes a fuel-tight seal
between the tank and the sensor. Two electrical wires connect to the sensor.
The fuel quantity gauge is on the right side of the instrument panel. The gauge gives a constant
low-voltage supply to the fuel quantity sensor. The gauge measures the current flowing in the
circuit to the sensor. You can adjust the gauge to give the correct zero indication.
The main bus supplies current for the system. When the float moves up or down, it changes the
resistance of the circuit through the sensor. The current flowing in the system decreases as the
resistance increases. The fuel quantity gauge uses the current to set the pointer.
Fuel
DA20-C1 AMM
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24 Mar 1999 28-40-00 Doc # DA201-C1
Rev. 1
Figure 1: Location and Installation of the Fuel Indication Components
DA20-C1 AMM
Fuel
Doc # DA201-C1
Rev. 0 28-40-00 Page 101
19 Dec 1997
TROUBLE-SHOOTING
1. General
Use the data below to trouble-shoot the fuel contents indicating system.
Complaint Possible Cause Remedy
Fuel quantity indication
incorrect.
Fuel quantity sensor defective.
Fuel quantity gauge defective.
High resistance connection in
the electrical wiring to the
sensor.
Replace the quantity sensor.
Replace the fuel quantity
gauge.
Do a resistance test between
the gauge and the sensor.
Repair the defective
connection.
Fuel
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19 Dec 1997 28-40-00 Doc # DA201-C1
Rev. 0
Intentionally left blank
DA20-C1 AMM
Fuel
Doc # DA201-C1
Rev. 0 28-40-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove/install components. It also tells you how to
and calibrate the fuel quantity indication system. See Chapter 28-00 for the system description.
2. Remove/Install the Fuel Quantity Sensor
A. Remove the Fuel Quantity Sensor
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Refer to Chapter 24-31
(2) Drain the fuel tank. Refer to Chapter 12-10
(3) Remove the baggage compartment floor. Refer to Chapter 25-10
(4) Release the electrical connections from the
fuel quantity sensor.
Refer to Figure 1
(5) Remove 5 screws which attach the fuel
quantity sensor to the tank.
WARNING: DO NOT ALLOW HEAT OR FIRE NEAR FUEL. FUEL BURNS
VIOLENTLY. THIS CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT
WARNING: DO NOT GET FUEL ON YOUR SKIN. FUEL CAN CAUSE SKIN
DISEASE.
(6) Remove the sensor. Discard the cork
gasket.
Fuel
DA20-C1 AMM
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24 Mar 1999 28-40-00 Doc # DA201-C1
Rev. 1
B. Install the Fuel Quantity Sensor
　
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