Kitfox service advisory 24.

SERVICE LETTER #24

SUBJECT:   PROPELLER INSTALLATION, TORQUING PROCEDURES, and MAINTENANCE

TO:  ALL KITFOX OWNERS

FROM:   SKYSTAR AIRCRAFT CORPORATION

Several issues have recently surfaced regarding the installation and maintenance of propellers installed on Kitfox aircraft. Proper propeller installation is absolutely essential to safe flight. Regular maintenance checks should be performed every 25 hours , at annual inspections, and 100 hour inspections; in addition to regular pre-flight inspections. This letter will review the significant facts regarding the care and installation procedures, torquing sequence, maintenance, and the use of SkyStar spinners with propellers other than GSC.

GSC PROPELLER INSTALLATION

The Kitfox construction manual directs the builder to install three drive lugs into the prop flange to help secure the bulkhead; current information from GSC indicates that “six” drive lugs are now called for.

NOTE:

Up until this Letter, all Kitfox spinner bulkheads have been drilled for three drive lugs and six bolts. The application to six drive lugs will require each builder to drill the three extra holes in the spinner bulkhead (these holes already exist in the propeller flange and bulkhead) . With three studs already in place, attach the spinner bulkhead on the flange and mark the other three hole from the back. These lug holes should be drilled with a Letter size “N” drill. The use of Loctite is recommended on these studs.

These drive lugs are available through SkyStar for a cost of $1.50 each, Part #91237.