As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REMOVAL OF MLG, DISCOVERED RETAINING SCREWS FOR UPR FWD TRUNNION HOUSING WEAR PLATE SHEARED OFF. *S/D* SCREWS SHEARED DUE TO MLG FORWARD TRUNNION UPPER HOUSING WEAR PLATE MOVEMENT. REPLACED FAILED WEAR PLATE RETENTION SCREWS AND ACCOMPLISHED SERVICE BULLETIN 777-57-0011 TO PROVIDE INCREASED RETENTION OF WEAR PLATES.