钻石20系列AMM 2(83)

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Figures 2 and 3 show the fuel hoses in the engine compartment. Two hoses connect the engine
fuel injection pump to the airplane fuel system. The fuel supply hose connects to the thru-nut
from the fuel shut-off valve at the firewall. The fuel return hose connects to the return thru-nut at
the firewall. Figure 2 shows the fuel hoses with
On aircraft equipped with the manifold valve fuel vapour separator, a second return line runs
from the fuel manifold valve through holes in the aft baffle and splash shield to join the fuel
injection pump return line at a tee fitting. The tee fitting is connected to the 90 fitting that is
connected to the return thru-nut at the firewall.
A heat shield on the right side of the engine protects the fuel injection pump supply and return
hoses from the exhaust manifold. P-clamps attach the hoses to the heat shield and to the front
of the engine.
You must bleed the engine fuel system after any work which allows air into the fuel system. The
air can become trapped and cause starting problems. Refer to the bleed procedure in
maintenance practices in this chapter.
Engine Fuel And Control
DA20-C1 AMM
Page 4
28 June 2005 73-00-00 Doc # DA201-C1
Rev. 11
Figure 2: Fuel Hoses in the Engine Compartment
DA20-C1 AMM
Engine Fuel And Control
Doc # DA201-C1
Rev. 11 73-00-00 Page 5
28 June 2005
Figure 3: Fuel Hoses in the Engine Compartment with Light Weight Heat Shield

DA20-C1 AMM
Engine Fuel And Control
Doc # DA201-C1
Rev. 1 73-00-00 Page 101
24 Mar 1999
TROUBLE-SHOOTING
1. General
Use the data below to trouble-shoot the fuel pressure indicating system.
Complaint Possible Cause Remedy
Engine will not start. Induction air filter blocked. Replace the blocked Induction
air filter.
Engine gives low power. Induction air filter blocked. Replace the blocked Induction
air filter.
Engine difficult to start. Air trapped in the fuel hose to
the fuel pressure sensor.
Bleed the fuel system.
Fuel pressure indication
incorrect.
Fuel pressure sensor defective.
Fuel pressure indicator
defective.
High resistance or open
connection in the electrical
wiring from the sensor.
Replace the pressure sensor.
Replace the fuel pressure
indicator.
Do resistance and continuity
tests between the indicator
and the sensor. Repair the
defective connection or wire.
Engine Fuel And Control
DA20-C1 AMM
Page 102
19 Dec 1997 73-00-00 Doc # DA201-C1
Rev. 0
Intentionally left blank
DA20-C1 AMM
Engine Fuel And Control
Doc # DA201-C1
Rev. 1 73-00-00 Page 201
24 Mar 1999
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove and install the induction and the fuel pressure
indication components. They also tell you how to bleed the fuel engine system. Refer to Chapter
28-00 for the airplane fuel system and to the TCM Maintenance Manual for the engine fuel system.
Note: You must bleed the engine fuel system after any work which allows air into the
fuel system. The air can become trapped and cause starting problems.
2. Remove/Install The Induction Air Filter
A. Remove The Induction Air Filter
Detail Steps/Work Items Key Items
WARNING: DO NOT STAND WITHIN THE DANGER AREA OF THE
PROPELLER. IF THE ENGINE STARTS, THE PROPELLER CAN
CAUSE DEATH OR INJURY TO PERSONS.
(1) Remove the engine cowlings. Refer to Chapter 71-10.
(2) Remove the rubber seal from the air intake. The rubber seal holds the forward screen
in position.
(3) Remove the forward screen from the air
intake.
(4) Remove the air filter.
B. Install The Induction Air Filter
Detail Steps/Work Items Key Items
(1) Examine the air intake. Look specially for
cracks:
− Make sure the air intake is clear of
debris.
(2) Carefully push the new air filter into position
against the rear screen of the air intake.
− Make sure you put the air filter in the
correct position.
(3) Install the forward screen to the air intake.
(4) Install the rubber seal to the air intake.
(5) Install the engine cowlings. Refer to Chapter 71-10.
Engine Fuel And Control
DA20-C1 AMM
Page 202
Draft 73-00-00 Doc # DA201-C1
Rev. 11
3. Remove/Install the Fuel Pressure Sensor
A. Remove the Fuel Pressure Sensor
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Refer to Chapter 24-31.
(2) Remove the top engine cowling. Refer to Chapter 71-10.
(3) Item deleted
(4) Release the electrical connections from the
fuel pressure sensor.
　
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