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pitch.
The propeller pitch control system is integrated into the engine. The pitch is controlled automatically
by the ECU. Depending on the power setting the propeller pitch is adjusted so that the required RPM
will be obtained as shown in Figure 2.
If the hydraulic pressure from the governor fails, the blades turn towards fine pitch. An adjustable fine
pitch stop limits the amount of blade movement towards fine pitch. The fine-pitch-stop is adjusted to
give maximum static RPM. If the governor fails during flight it is possible to over-speed the propeller.
Refer to Section 05-50 for data on over-speeds.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 4
20 Sep 2007 61-11-00 Doc # 6.02.01
Rev. 5
2000
2300
2175
1750
0
RPM
0 20 % LOAD 75 100
Figure 2: Propeller RPM Adjusted by the ECU
AIRCRAFT
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-11-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
The table below lists the defects you could have for the propeller. If you have the trouble detailed in
the Trouble column read across to the Possible Cause column. Then do the repair in the Repair
column.
Trouble Possible Cause Repair
Engine vibration. Propeller out of balance.
Spinner out of balance.
Propeller mounting loose.
Spinner attaching screws
loose.
Blade tracking not correct.
Examine the propeller. If you
find damage refer to the
manufacturer’s Owners
Manual.
Replace the spinner.
Tighten the mounting nuts to
the correct torque. Refer to the
manufacturer’s Owners
Manual.
Tighten the attaching screws.
Refer to the manufacturer’s
Owners Manual.
Refer to the manufacturer’s
Owners Manual.
Cracks in the blades. Over-speed. Refer to the manufacturer’s
Owners Manual.
Holes/nicks/dents in the blade. Stone damage. Repair/replace the propeller.
Refer to the manufacturer’s
Owners Manual.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 102
20 Sep 2007 61-11-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-11-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the propeller. And they tell you how to
do a propeller blade tracking test.
2. Remove/Install the MTV-6-A Propeller
A. Remove the Propeller
Detail Steps/Work Items Key Items/References
WARNING: MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU DO ANY
WORK ON THE PROPELLER. IF THE ENGINE IS TURNED, THE
PROPELLER CAN CAUSE INJURY OR DEATH.
(1) Make sure that the engine is safe:
S Set the ELECTRIC MASTER key switch to
OFF.
S Set the ENGINE MASTER switch to OFF.
S Set the power lever to IDLE.
(2) Remove the engine cowlings. Refer to Section 71-11.
Note: Mark the propeller, spinner, front support plate and spinner bulkhead, with an
index mark. This will help you install these items in the correct position.
(3) Remove the spinner:
S Mark the spinner and spinner bulkhead with
index marks to aid installation.
S Release the screws holding the spinner to the
spinner bulkhead and move the spinner clear
of the airplane.
Refer to Figure 1.
(4) Remove the nuts and washers which attach the
propeller to the propeller shaft flange.
Hold the propeller!
(5) Pull the propeller forward and clear of the
propeller shaft flange.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 202
20 Sep 2007 61-11-00 Doc # 6.02.01
Rev. 5
OIL SEAL LOCATION IN THE HUB
Hub
Engine
Flange
Oil Seal
Attaching Nut
and Washer
Spinner Attaching
Screws
Engine Flange
Spinner Bulkhead
Spinner Dome
Hub
Figure 3: Propeller Oil Seal Installation
AIRCRAFT
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-11-00 Page 203
20 Sep 2007
B. Install the Propeller
Detail Steps/Work Items Key Items/References
WARNING: MAKE SURE THAT THE ENGINE IS SAFE BEFORE YOU DO ANY
WORK ON THE PROPELLER. IF THE ENGINE IS TURNED, THE
PROPELLER CAN CAUSE INJURY OR DEATH.
(1) Make sure that the engine is safe:
S Set the ELECTRIC MASTER MASTER key
switch to OFF.
S Set the ENGINE MASTER switch to OFF.
S Set the power lever to IDLE.
(2) Make sure that the propeller shaft flange and the
propeller flange are clean and dry.
(3) Make sure that a new O-ring oil seal is in place in
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