WARNING: Avoid aggressive media like acetone as this could ruin the surface finish.
4.4.2.2 Inspections
After 25 hours of operation the operator or AMO must inspect the propeller after washing it
thoroughly for any cracks and raptures. Chips and cracks could cause the propeller to become
unbalanced which will increase vibrations.
The following cracks can be tolerated:
1. Cracks on the surface with a distance greater than 5 mm if they cannot be felt
2. Cracks in cobweb form or with concentric rings if they are smaller than 10 cm
3. Bumps due to small stones smaller than 5 mm
4. Swelling smaller than 10 mm
5. Cracks in the erosion protection at the nose, if smaller than 5 mm
6. Yellowed erosion protection
7. Inspect the locking wires between the screws on the hub to ensure there are no frayed
or broken wires
Greater flaws, especially cracks and holes where ends of fibers become visible or crack in the
trailing edge must be repaired. If there is any doubt, send the propeller to Technoflug for repair.
WARNING: The propeller must be statically balanced after repair and before fitment and it
is recommended to verify the vibrations caused by the propeller by having it
dynamic balanced. Excessive vibrations could cause damage or destroy the
propeller and other components.
Removal
1. Extend the pylon to the extended position.
2. Switch off the RES master switch.
3. Remove the Locking wire (3).
4. Remove the six Propeller fastening bolts (2).
5. Remove the Propeller (1) and Propeller ring (2).
NOTE: Before removing the propeller, note or mark the relative position of the propeller
to the motor. If the relative orientation is changed with the propeller installation,
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