As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM TABS ON AIRCRAFT WERE INSPECTED FOR RIVETS. FOUND LT ELEVATOR TRIM TAB THAT WAS INSTALLED 10 HOURS PRIOR, TO BE MISSING ALL RIVETS. THE SKINS WERE BONDED BUT RIVETS WERE NEVER INSTALLED. THE TRIM TAB HAD BEEN SITTING ON OUR SHELF FOR 2 YEARS BEFORE INSTALLATION. THOUGH INSPECTION OF TRIM TABS BEFORE INSTALLATION TO VERIFY RIVET INSTALLATION.