OPERATION AND INSTALLATION MANUAL
EN-1320
1 Rotate the propeller to place one of the blades parallel to the ground. Measure the angle
of the blade. Make note this angle.
2 Rotate the propeller to place another blade to the same position as the previous blade
was measured. Measure and note the angle.
3 Measure the angle of all blades by the same way.
c) If the difference in angle of all blades is between 0,3 degrees, the installation is correct.
d) When the difference in angle of all blades is above 0,3 degrees, follow these steps:
1 Remove the blade from the hub.
2 Using the sandpaper or needle file, carefully remove the position mark from the edge of
the blade bushing. Do not remove more material than is necessary to remove the mark.
3 Thoroughly clean inside of the blade bushing.
4 Reinstall the blade into the hub. Using the protractor, set the blade so that the difference
in angle of all blades is between 0,3 degrees. Tighten the blade clamp with a specified
torque and check that the blade angle is still correct.
5 Using a sharp tip needle and a suitable flat block, engrave the position mark on the blade
bushing edge, opposite to the position mark on the blade.
6 Treat the blade bushing edge with zinc coat or with clear lacquer.
7 Make an entry in the propeller logbook to document that an original position mark was
changed.
7.6. REPLACEMENT OF CARBON BLOCK IN THE 222-0206-1 CARBON BLOCK ASSEMBLY
7.6.1.
Replace the carbon block if the side clearance between the beta ring and carbon block
exceeds the limit specified in Installation and Operation Instruction chapter of this manual.
7.6.2.
Replacement set includes the carbon block, clevis pin, washer and cotter pin.
7.6.3.
Before replacing the carbon block, inspect the yoke unit for damage or cracks.
7.6.4.
Replacement Procedure - see figure 7-1.
a) Remove and discard the cotter pin and the washer from the end of the clevis pin.
b) Slide the clevis pin from the assembly.
c) Remove the carbon block from the yoke.
d) Install a new carbon block. Align the hole in the carbon block with the holes in the yoke and
slide a new clevis pin through.
e) Install a new washer over the protruding end of the clevis pin.
f) Secure the clevis pin with a new cotter pin.
7.6.5.
Install the carbon block assembly into the feedback lever and into the beta ring. Refer to
chapter „Installation and Operation Instruction“ in this manual.
61-10-20
MAINTENANCE
Page 7-3
2017-10-06
