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20 Sep 2007 34-58-00 Doc # 6.02.01
Rev. 5
6. Test the GPS
Detail Steps/Work Items Key Items/References
(1) Switch the GPS ON:
S Set the ALT/BAT switch (Lycoming version)
or ELECTRIC MASTER key switch (TAE
version) ON.
S Set the AVIONIC MASTER switch ON.
S Set the ON-OFF knob on the GPS receiver to
ON.
The GPS display must light.
(2) Observe the self-test of the GPS receiver. Bendix/King KLN 89B and KLN 94:
S The displayed altitude must be
correct.
S The display must show "Pass".
Bendix/King KMD 150:
S There must be no warning.
Garmin GNS 430/530:
S The displayed database information
must be correct.
S The display must show "OK?".
(3) Do a test of each control function. Refer to this Section and to the GPS
manufacturer's manual.
(4) Switch the GPS OFF:
S Set the ON-OFF knob on the GPS receiver to
OFF.
S Set the AVIONIC MASTER switch OFF.
S Set the ALT/BAT switch (Lycoming version)
or ELECTRIC MASTER key switch (TAE
version) OFF.
AIRCRAFT
DA 40 Series
AMM
Vacuum
Doc # 6.02.01
Rev. 5 37-TITLE Page 1
20 Sep 2007
CHAPTER 37
VACUUM SYSTEM
AIRCRAFT
Vacuum DA 40 Series
AMM
Page 2
20 Sep 2007 37-TITLE Doc # 6.02.01
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Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Vacuum
Doc # 6.02.01
Rev. 5 37-CONTENTS Page 1
20 Sep 2007
TABLE OF CONTENTS
CHAPTER 37
VACUUM SYSTEM
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Trouble-Shooting
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Maintenance Practices
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
2. Remove/Install the Vacuum Regulator . . . . . . . . . . . . . . . . . . . . . 201
3. Replace the Vacuum System Air Filter . . . . . . . . . . . . . . . . . . . . . 203
4. Adjust the Vacuum Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
5. Remove/Install the Suction Gauge . . . . . . . . . . . . . . . . . . . . . . . . 205
AIRCRAFT
Vacuum DA 40 Series
AMM
Page 2
20 Sep 2007 37-CONTENTS Doc # 6.02.01
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Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Vacuum
Doc # 6.02.01
Rev. 5 37-00-00 Page 1
20 Sep 2007
24
27
30
33
21
18
15
12
9
6
3
0
PUSH
S
4
5
6
U C T I O
N
Orifice
Engine-Driven
Vacuum Pump Vacuum
Regulating Valve
Air Filter
Directional Gyro
Suction Gauge
Engine Compartment
Instrument Panel
CHAPTER 37
VACUUM SYSTEM
1. General
The DA 40 with the TAE 125 Diesel engine has a vacuum system. The system uses the vacuum pump
that is part of the TAE 125 Diesel engine. You cannot replace the vacuum pump. If you have trouble
with the pump, refer to the engine manufacturer.
2. Description
Figure 1 shows the vacuum system schematic diagram. Figure 2 shows the installation and locations.
A vacuum pump that is integral with the engine powers the system. A flexible hose connects the pump
to a vacuum regulating valve located on the aft face of the firewall. A small orifice in the pipe restricts
the airflow to the correct level for the system.
Figure 1: Vacuum System Schematic Diagram
AIRCRAFT
Vacuum DA 40 Series
AMM
Page 2
20 Sep 2007 37-00-00 Doc # 6.02.01
Rev. 5
Directional
Gyro
Vacuum Regulator
Air Filter Suction Gauge
Flexible Hoses
To Vacuum Pump
on Engine
Figure 2: Vacuum System Installation
AIRCRAFT
DA 40 Series
AMM
Vacuum
Doc # 6.02.01
Rev. 5 37-00-00 Page 3
20 Sep 2007
The inlet pipe of the valve goes through the firewall. Nuts on the inlet pipe attach the valve to the
firewall. The regulator valve has an adjuster at the bottom. You can adjust the valve to give the correct
suction, usually between 4.8 and 5.4 inHg.
A flexible hose goes from the regulator valve to a directional gyro located on the left of the instrument
panel. A flexible hose goes from the directional gyro to an inlet filter located on the instrument panel
floor. A small flexible hose goes from the directional gyro to a suction gauge located at the top of the
　
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