Prop spinners, propeller spinner advisory.

KITFOX SERVICE LETTER #9

SUBJECT:     PLASTIC SPINNERS

TO:     KITFOX OWNERS WITH 3-BLADE PROP AND PLASTIC SPINNER

FROM:     DENNEY AEROCRAFT COMPANY

PLASTIC SPINNERS. We have had two instances of the plastic spinner coming off in flight causing blade damage; in one case complete loss of one blade resulting in the engine nearly shaking out of the mounts. Spinners and hubs of both units had been painted.

REMOVE THE SPINNER. Do not fly the aircraft or run the engine with the spinner installed until this condition is remedied.

We are developing a plate to be attached behind the 1” hole in the front hub half which will allow a 3/16” dia. long bolt to be installed through the tip of the spinner and back into the plate locking the spinner onto the hub. We will notify you as soon as the modification kit is available.

If you paint the spinner and hub take care to mask off the area of each that contacts each other to avoid paint interfering with the attachment lugs. Paint only light color that will reflect sun light. A darker color will heat up and cause the plastic to soften.