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%
3. Propeller Blade Tracking Test
A. Equipment
Item Quantity Part Number
Tracking stand. 1 Commercial.
B. Procedure
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) Disconnect the spark plug cables from the spark plugs.
(4) Put the tracking stand behind the propeller. Do not move the tracking stand during the test.
(5) Turn the propeller backwards to align a blade with the tracking stand.
(6) Measure the distance from the stand to the blade. Measure from the stand to a point on the trailing edge 10 cm (4 in) from the blade tip.
(7) Do items 5 and 6 for the other blades and record the values.
(8) The difference between any blades must not be more than 3 mm (1/8 inch).
4. Blade Repairs
You can do minor repairs but you cannot do major repairs. Refer to the propeller manufacturer’s manual for more data about assessing blade damage and doing blade repairs.
Page 206 Doc # 6.02.01 09 Jan 2003 Rev. 4
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Propeller
AMM
% Section 61-11
% Propeller Assembly - TAE 125 Diesel Engine
% 1. General
% The DA 40 with the TAE 125 Diesel engine has an mt-Propeller MTV-6-A /187-129 variable pitch % propeller. This propeller has 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 61-21 tells you about the propeller governor.
% Refer to the propeller manufacturer’s manuals for more data on the propeller.
% 2. Description
% Figure 1 shows you the propeller. The propeller hub has six studs on the rear face. The propeller % attaches to the engine crankshaft flange with six nuts and washers.
% 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 engine has an integral governor. The governor controls the propeller pitch hydraulically. Gearbox % oil flows via the gearbox driven pump and a pressure limiter valve to the governor. The governor % consists of an electrically controlled three-way valve to control the oil pressure in the propeller pitch % change mechanism. The oil pressure is increased for higher pitch angles and reduced for lower pitch % angles. The oil flows from the governor to the propeller hub through the hollow propeller shaft.
Doc # 6.02.01 Page 1
Rev. 4 09 Jan 2003
61-11-00
AMM
% % % Figure 1: Propeller Assembly - TAE 125 Diesel Installation %
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