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(2)  Remove the engine cowlings.  Refer to Section 71-10. 
(3)  Disconnect the spark-plug-leads from the spark plugs. 
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. 
(4)  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. S Release the screws holding the spinner to the front support plate and move the spinner clear of the airplane. S Mark the front support plate with an index mark to align with the other index marks.  Refer to Figure 1. 

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Figure 1: Propeller Installation
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Detail Steps/Work Items  Key Items/References 
(5)  Cut the lock-wire on the attaching bolts. 
(6)  Remove the special bolts which attach the propeller to the crankshaft flange.  Hold the propeller! 
(7)  Pull the propeller forward and clear of the crankshaft flange bushings. 

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 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)  Make sure that the spark-plug cables are disconnected from the spark-plugs. 
(4)  If necessary, install the spinner bulkhead onto the hub: S Ensure that the mating surfaces are clean and dry. S Install the six bolts and washers which attach the spinner bulkhead to the hub. S Lock the bolts in pairs with lock-wire.  Align the index marks. 
(5)  Make sure that the engine flange, engine flywheel and the propeller flange are clean and dry. 
(6)  Make sure that a new O-ring seal is in place in the propeller hub. Lightly oil the seal.  Refer to Figure 2. Use clean engine oil. 

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Figure 2: Remove/Install the Propeller
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DA 40 Series

Detail Steps/Work Items  Key Items/References 
(7)  If necessary, install the six special bolts which attach the propeller hub to the crankshaft flange. 
(8)  Move the propeller into position on the crankshaft bushings.  Take care not to damage the propeller O-ring seal. 
(9)  Turn each bolt a small amount. Turn the bolts in opposing pairs until they are finger tight.  Make sure that the propeller is pushed into the correct position by hand. Do not use the bolts to pull the propeller into position. 
(10)  When the propeller is in the correct position fully tighten the bolts in opposing pairs.  Torque 85 - 90 Nm (63 - 66 ft.lb). 
(11)  Lock the bolts in pairs with lock-wire. 
(12)  If necessary, install the front support plate: S Ensure that the mating surfaces are clean and dry. S Install the six screws and washers which attach the support plate to the hub. S Lock the screws in pairs with lock-wire.  Align the index marks. 
(13)  Do a test for correct blade track.  Refer to Paragraph 3. 
(14)  Install the spinner: S Loosely install the screws and plastic washers which attach the spinner to the spinner bulkhead. S Loosely install the screws and plastic washers which attach the spinner to the front support plate. S Tighten all the attaching screws.  Align the index mark. Torque 4 - 5 Nm (35 - 44 in.lb) 
　
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