As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RIVETING BRAKE LININGS ONTO BACK PLATES, SOME RIVETS WOULD NOT TIGHTEN. SOME PLATES WERE FOUND BRONZE, SOME STEEL, BUT DIFFERENT DIMENSIONS. OWNER DID NOT KNOW OF A DUAL BRAKE STC BEING INSTALLED ON THIS AIRCRAFT. THIS WAS OF A NON-ORIGINAL MANUFACTURE TYPE ALTHOUGH THE BRAKES LOOKED IDENTICAL WHEN DIRTY. THE ORIGINATOR OF THE STC COULD NO LONGER BE LOCATED TO PURCHASE PARTS.