As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF THE FUSELAGE FRAME SPLICE AT FS 440 PER S/B 737-53-1125 IT WAS NOTED THAT FIVE FASTENERS WERE INSTALLED AT THE FACTORY WERE .25 INCHES IN DIAMETER. THE S/B CALLS FOR .2187 INCH FASTENERS. ERA 334853-14 ALLOWS FOR THE .25 INCH FASTENERS. THE MODIFICATION WAS ACCOMPLISHED AT HMV.