As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TAXING FOR T/O, THE NLG COLLAPSED, FOLLOWED BY BOTH MAIN GEARS. INSPECTION REVEALED THE LANDING GEAR RETRACTION LEVER ASSEMBLY SEPARATED AT THE WELD. THE WELD SHOWED SIGNS OF AN OLDER CRACK BEING PRESENT AT WELD, PRIOR TO COMPLETE FAILURE.