Ivoprop service bulletin, Ivoprop safety tape installation.

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Ultralight aircraft safety advisory

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.

For more information on the IVOPROP Click here.

 

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