As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED NEW AILERON TRIM TAB FROM VENDOR. TAB WAS A NEW PART FROM MFG. INCOMING INSP NOTED THE RIVETS THAT SHOULD HAVE BEEN INSTALLED TO SECURE THE ACTUATOR HORN TO THE TAB WERE MISSING. THERE IS ALSO A ROW OF RIVETS, ALONG THE HINGE LINE, THAT WERE MISSING. THESE RIVETS ARE THE SUBJECT OF A SB. THIS IS THE SECOND TAB REJECTED FOR THIS PROBLEM.