As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A 15 DAY CORROSION INSPECTION, A MECHANIC NOTICED "PAINT BUBBLING" ON THE LT ELEVATOR CONTROL PITCH HORN. UPON FURTHER INVESTIGATION BY SCRAPING-OFF THE PAINT BUBBLE, PITTING CORROSION WAS FOUND. AN ATTEMPT WAS MADE TO CLEAN AND TREAT THE PITTED AREA, BUT IT WAS FOUND THAT THE PITS WERE TOO DEEP INTO THE METAL. A NEW PITCH HORN WAS ORDERED AND THE AFFECTED PART WAS REPLACED.