Aircraft:
All ultralight aircraft using 70 inch IVOPROP with Rotax 3 to 1
reduction drive.
Problem area:
I have a number of reports of failure of the blades on the
IVOPROP when the blades are 70 inches, or over and a 3 to 1
Rotax reduction drive is used. In conversation with the
manufacturer he indicates that was aware of the problem,
and has taken steps to eliminate the problem.
All cases reported were prior to 1995.
Suggestions:
If you are flying on an IVOPROP, especially an older model
using the above combination it is suggested that you check your
prop for damage around the base of the blades, where the hub is.
That you contact the manufacturer for update information.
The IVOPROP comes with a square piece of safety tape and
instructions on how to install it. This tape MUST be installed so
you see if your blades have moved due to improper torque or loose
bolts.
Cut the strips of
stainless steel tape about 2 "long and 3/8 " wide.
Clean the area
around gap between blades or gap between blades and blade
blocks by rubbing it with clean napkin soaked with M.E.K
solvent.
Apply stainless
steel tape across the gap next and parallel to mold
parting line. Use a round object to press the tape on the
surface.
Follow this
inspection schedule to check if tape is broken:
After short ground
run up through full RPM range on the ground and then first
15minutes, 30minutes, 1 hour,
2hours, 4hours and then every preflight inspection.
If
tape breaks or cracks remove the tape, clean the surface
with M E. K and apply new tape and start the inspection
schedule from the beginning. If
tape breaks again remove the prop from the service and
contact IVOPROP Corp.
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