As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION AND AD 75-09-08 COMPLIANCE, FOUND LOWER RT CORNER WELD JUNCTION FULLY BROKEN AND SEPARATED. SB M20-175 & M20-192 HAD NOT BEEN COMPLETED, THAT WAS DESIGNED TO BE PREVENTED BY INSTALLING GUSSET AT THIS CORNER (P/N 590041-1). MOUNT WAS FOR 180 HP ENGINE AND NOT UPGRADED.