As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DISASSEMBLY FOR PAINT, CORROSION WAS NOTED UNDERNEATH THE BALANCE WEIGHT. AFTER REMOVAL OF THE BALANCE WEIGHT, CORROSION, HEAVY PITTING WAS FOUND ON THE MATING SURFACE OF THE CHANNEL. THE BALANCE WEIGHT CHANNELS ON THE RT AND LT ELEVATORS WERE REPLACED TO RECTIFY THE DEFECTS.