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S Install the split cover plates over the split
bushes and attach to the firewall with poprivets.
Seal the firewall feed-thru with fire-proof
sealant PRC 812.
(14) Adjust the propeller control cable. Refer to Paragraph 4.
(15) If necessary, for your airworthiness authority, do
a second inspection of the propeller control
system and any other control system you
disconnected.
(16) Connect the spark-plug-leads to the spark plugs. Refer to Section 74-00.
(17) Install the engine cowlings. Refer to Section 71-10.
(18) Do an engine run-up. Refer to the Airplane Flight Manual.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 210
20 Sep 2007 61-20-00 Doc # 6.02.01
Rev. 5
4. Adjust the Propeller Control Cable
Detail Steps/Work Items Key Items/References
WARNING: MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU DO ANY
WORK ON THE PROPELLER CONTROLS. IF THE ENGINE IS
TURNED, THE PROPELLER CAN CAUSE INJURY OR DEATH.
(1) Make sure that the engine is safe:
S Set the ignition switch to OFF.
S Set the throttle to IDLE.
S Set the mixture control to LEAN CUT-OFF.
(2) Remove the engine cowlings. Refer to Section 71-10.
(3) Disconnect the spark plug cables from the spark
plugs.
Refer to Section 74-00.
(4) Move the propeller control lever in the cockpit
between MIN RPM and MAX RPM.
S Make sure that the lever moves freely with no
restrictions.
(5) Set the propeller control lever to MAX RPM and
hold it in position:
S Make sure that the control lever at the
propeller governor hits the MAX stop at the
governor. If necessary, adjust the control
cable outer sheath at the support bracket at
propeller governor.
With the propeller control lever at the
MAX stop at the governor, there must
be at least 3 mm (0.125 in.) clearance
(bounce) between the propeller control
lever in the cockpit and the stop in the
engine control assembly.
(6) Set the propeller control lever to MIN RPM and
hold it in position:
S Make sure that the control lever at the
propeller governor hits the MIN stop at the
governor. If necessary, adjust the control
cable outer sheath at the support bracket at
propeller governor.
With the propeller control lever at the
MIN stop at the governor, there must be
at least 3 mm (0.125 in.) clearance
(bounce) between the propeller control
lever and the stop in the engine control
assembly.
AIRCRAFT
DA 40 Series
AMM
Propeller
Detail Steps/Work Items Key Items/References
Doc # 6.02.01
Rev. 5 61-20-00 Page 211
20 Sep 2007
(7) Move the propeller control lever in the cockpit
between MIN RPM and MAX RPM.
S Make sure that the lever moves freely with no
restrictions.
(8) Do items 5 & 6 again as necessary to get the
correct values.
It may be necessary to move the cable
wire-end in the cable attachment bolt.
(9) If necessary, for your airworthiness authority, do
a second inspection of the propeller control
system.
(10) Connect the spark plug cables to the spark plugs. Refer to Section 74-00.
(11) Install the engine cowlings. Refer to Section 71-10.
(12) Do an engine run-up. For RPM settings and engine run-up,
refer to the Airplane Flight Manual.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 212
20 Sep 2007 61-20-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-21-00 Page 1
20 Sep 2007
Section 61-21
Propeller Control - TAE 125 Diesel Engine
1. General
The DA 40 with the TAE 125 Diesel engine installed has a constant speed propeller. The engine has
an integral constant speed unit (CSU). The CSU controls the engine speed by changing the propeller
blade angle (pitch).
% This Section gives background data about the propeller control system. In case of problems with the
propeller control system, refer to the engine manufacturer.
2. Description and Operation
The DA 40 has an mt-Propeller constant speed propeller. The propeller uses oil pressure to increase
the blade angle (pitch). In normal flight the centrifugal twisting moment (CTM) of the blade and the
return spring cause the blade to move towards fine pitch.
The engine CSU is an integral part of the engine control system. The engine control system measures
many engine parameters. It uses the values to set fuel flow and propeller blade angle for most efficient
performance. The pilot has only one lever to control engine performance.
As with other constant speed propeller control systems, the CSU senses engine RPM and alters oil
　
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