As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE FIRST 2500 HOUR OVERHAUL, IT WAS FOUND THAT THE PITCH HORNS PN 407-010-103-101, HAD CORROSION AND PITTING OF AFT SURFACE OF PITCH HORN UNDER THE WEAR PLATE. PART IS BONDED TO PITCH HORN WITH METAL SET. SUGGEST THE EDGES OF PLATE BE PRO SEALED AFTER METAL SET HAS CURED. THREE OF THE FOUR PITCH HORNS HAD TO BE SCRAPPED.