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Rev. 5 61-10-00 Page 1
20 Sep 2007
Section 61-10
Propeller Assembly - Lycoming Engine
1. General
% The DA 40 with the Lycoming engine installed has an mt-Propeller MTV-12-B/180-17or an MTV-12-
% B/180-17f variable pitch propeller installed. These propeller types have 3 blades. The blades are made
from wood and are covered with GFRP. The blades have an acryl 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 propeller and how to do a test for blade tracking.
Section 61-20 tells you about the propeller governor and how to remove/install the governor.
Refer to the propeller manufacturer’s manuals for more data on the propeller.
2. Description
Figure 1 shows you the propeller. The propeller attaches to the engine crankshaft flange bushings with
six special bolts (stud with a castle nut; castle nut attached to stud by means of a split pin). The bolts
are locked with wire. The bolts are retained within the propeller hub.
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. The spinner is supported by the front support plate. Screws attach the spinner to the front
support plate.
The propeller has a Woodward governor. The governor attaches to a drive pad on the left side of the
engine at the front. The governor controls the propeller pitch hydraulically. Engine oil flows through
internal oil galleries to the governor. The governor has a geared oil pump which increase the oil
pressure. The oil flows from the governor to the propeller hub through the hollow crankshaft.
AIRCRAFT
Propeller
DA 40 Series
AMM
Page 2
20 Sep 2007 61-10-00 Doc # 6.02.01
Rev. 5
3. Operation
A pre-loaded spring (return spring) turns the propeller blades towards fine pitch. In addition, when the
propeller is turning, centrifugal twisting moments also cause the blades to turn towards fine pitch.
Hydraulic pressure in the cylinder acts on a piston and the piston moves the blades towards coarse
pitch.
In normal flight the propeller governor will maintain the RPM set by the pilot and also control the engine
maximum RPM.
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
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-10-00 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.
The 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 61-10-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Propeller
Doc # 6.02.01
Rev. 5 61-10-00 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-12-B/180-17 or the MTV-12-B/180-17f Propeller
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本文链接地址：
钻石40系列AMM 3(2)
