As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 2149 Z PILOT ADVISED HE BELIEVED THE AIRCRAFT LT MAIN GEAR COLLAPSED. THE SAFETY DEVICE (ROLL PIN) WAS NOT INSTALLED. THIS ALLOWED THE NUT TO ROTATE ALLOWING THE STUD TO BACK OUT OF THE CASTING. THIS CAUSED THE LT MAIN LANDING GEAR TO COLLAPSE. AD97-01-01R1 TO PREVENT MAIN LANDING GEAR (MLG) COLLAPSE CAUSED BY MAIN GEAR SIDE BRACE STUD CRACKED. ANNUAL INSPECTION C/W FEB 1, 2005.