6.2
50 Hour Inspection
1. BLADES: Inspect the propeller system blades for any nicks,
cracks, or chips. Inspect blades for cracks in the composite
skins and nickel leading edges. No cracks are allowed in either.
If cracks are present return propeller for repair to a Whirl Wind
Aviation service center.
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Inspect the cambered side of each blade for chord-wise
cracks and the entire blade for any delamination of the
composite skin or obvious discoloration.
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Small cracks parallel along the nickel edge are allowed
as long as the leading edge is not loose. Scratches or
chips should be sealed up as soon as practicable.
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In case of any questionable conditions, please contact
the service department of Whirl Wind Aviation.
2. BLADE FERRULES: Inspect each aluminum blade ferrule and
blade intersection (located at the root end of blade where the
silicone sealant is visible) for movement and/or signs of chafing.
Gently flex the blade at the tip to check for any movement
between the aluminum ferrule and blade root – no movement is
allowed. There should be no movement between aluminum
ferrule and blade. Notify Whirl Wind Aviation immediately if
movement is detected.
3. BLADE MOVEMENT: Gently shake each propeller blade to feel
for blade movement in the hub. Blade shake movement is
allowed up to 1/8 inch, measured from the tip. Radial play of up
to 2 degrees is acceptable. If the check shows values above
these tolerances, contact Whirl Wind Aviation immediately.
Movement is only allowed between the aluminum blade ferrule
and the propeller hub, not as described in item #2 above.
4. LEADING EDGE: Inspect the nickel leading edge erosion shield.
The nickel erosion shield should not be loose or have any
cracks. Small paint cracks parallel to and along the edge of the
shield where the nickel and paint meet are acceptable.
5. SPINNER: Remove spinner and check for nicks, cracks or
chips. Check spinner dome and the aft & forward bulkheads for
cracks of any kind or looseness. Also inspect for any signs of
chafing.
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Ensure secure attachment to the hub.
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Check AN3 bolt on aft bulkhead for tightness.
6-2
