As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING THE MODIFICATION TO THE RS FS 440 FRAME PER S/B 737-53-1125 IT WAS NOTED THAT THE INITIAL FASTENERS AT THE SUBJECT LOCATIONS (5) WERE MS20470D8 RIVETS. THE S/B CALLS FOR THESE LOCATIONS TO BE OVERSIZED TO .2187 INCH RIVETS. ERA 334686-14 ADDRESS THESE DISCREPANCIES. THIS ITEM WAS DISCOVERED AT HMV.