AIRCRAFT
DA 42 NG AMM
Propeller
Doc # 7.02.15
Rev. 4
61-10-00
Page 1
15 Mar 2018
Section 61-10
Propeller Assembly
1. General
The DA 42 NG has MTV-6-R-C-F/CF187-129 variable pitch and feathering propellers. Each propeller
has three blades. The blades are made from wood and are covered with GFRP. The blades have an
acrylic lacquer painted finish. The outboard leading-edges of the blades are protected from erosion
by a stainless-steel sheath. The stainless-steel sheath is bonded into position. The inboard section of
the leading-edge is protected by a self-adhesive rubber strip (PU tape).
This Section tells you how to remove and install the propellers and how to do a test for blade tracking.
Section 61-20 tells you about the propeller governor.
Refer to the propeller manufacturer’s manuals for more data on the propeller.
If OÄM 42-204 is carried out, a gearbox fan with an additional alternator pulley is installed on the
gearbox flange of the LH engine.
2. Description
Figure 1 shows the propeller. The propeller hub has six studs on the rear face. The propeller attaches
to the engine gearbox flange with six nuts and washers.
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If OÄM 42-204 is carried out, an additional alternator gearbox fan with an additional alternator pulley
is installed on the gearbox flange of the LH engine using a prop flange pulley support. The six propeller
attachment nuts mount the gearbox fan assy and the propeller to the gearbox flange (Figure 2).
A spinner bulkhead (spinner backplate) attaches to the rear of the hub with six bolts. The bolts are
locked with wire. A front support plate attaches to the front of the hub with six screws. The screws are
locked with wire. A spinner which is made from composite material attaches to the aft bulkhead with
screws.
When the engine is running centrifugal twisting moments make the propeller blades move towards fine
pitch. The propeller of the DA 42 NG has counterweights attached to the propeller blades. The
counterweights overcome the centrifugal twisting moment of the blades and cause the blades to move
to coarse pitch.
The engine has a electronic engine control system EECS including an electronic engine control unit
(EECU). The EECU controls the propeller pitch hydraulically. Gearbox oil flows via the constant speed
governor to control the oil pressure in the propeller pitch change mechanism. The oil pressure is
increased for lower pitch angles and reduced for higher pitch angles. The oil flows from the governor
to the propeller hub through the hollow propeller shaft.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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