As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN AXLE SEPARATED FROM BACKING PLATE AT LANDING CAUSING MAIN SPRING TO DIG IN, WHICH CAUSED THE PLANE TO NOSE OVER. INSPECTION OF THE AXLE ASSEMBLY REVEALED VERY LITTLE WELD PENETRATION AND THE WHOLE DESIGN WAS VERY INADEQUATE FOR THE TYPE OF OPERATIONS THAT THIS GEAR ASSEMBLY MARKETED TO.