As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KNOTS 2U AILERON AND FLAP SEALS INSTALLED (5-20-86 TACH 948.94) UNDER STC SA 640GL. DURING AILERON DOWN-TRAVEL, THE UNDERSIDE AILERON RIVETS (SKIN TO AILERON SPAR) RUB ON THE GAP SEAL WEARING THE RIVET HEADS APPROXIMATELY 50 PERCENT IN SOME AREAS AS RIVETS ARE REPLACED AND LARGER HEADED RIVETS ACT AS RUB BUTTONS AND WEAR DOWN. SUGGEST NYLON RUB STRIPS BE ATTACHED TO THE AILERON (AND BALANCE).