As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WELDMENT AT TOP OF NOSE GEAR LEG FAILED AND GEAR COLLAPSED UPON LANDING. GEAR LEG APPEARED NORMAL DURING PREFLIGHT AND IN LAST SAFETY INSPECTION. NO OUTWARD INDICATION OF DEFECT. SUBSEQUENT INSPECTION OF BROKEN WELD (BY OWNER/BUILDER) APPEARED TO SHOW SLIGHT CRACK AT ONE CORNER, WHICH, IF REAL, PROBABLY WAS SOURCE OF FAIL. (K)