As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C CHECK, FOUND CORROSION ON HORIZONTAL STABILIZER UPPER SKIN LEADING EDGE FROM STATION XFS 178.00 TO STATION 203.750 TO THE RIGHT HAND REAR. DAMAGED AREA WAS CLEANED AND EXTERNAL DOUBLER WAS FABRICATED AND INSTALLED IAW EWO ATI 55-018.