What was found
TAIL POST BROKE OFF FROM LOWER LONGERON. THIS WAS A FACTORY KIT FUSELAGE PART. TAIL POST IS .75 INCH BY .035 INCH, 4130 TUBING. IT APPEARS TO BE CAUSED BY POOR ENGINEERING, TAIL WHEEL AND SPRING OVERLOADED THE STRUCTURE. DEFECT FOUND WHEN DOING A PRE-FLIGHT INSPECTION. ADDITIONAL DEFECTIVE FLAP HANDLE BROKE WHEN LANDING, .035 INCH BY .8750 INCH ALUMINUM TOO LIGHT MATERIAL.