As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AIRCRAFT C5-CHECK , MAINTENANCE DISCOVERED CORROSION DAMAGE ON THE UPPER SKIN PANEL OF THE RIGHT HORIZONTAL STABILIZER BETWEEN FRONT SPAR HSS 157.439 AND 182.093. THE CORROSION WAS BLENDED IAW SRM AND FOUND TO BE OUT OF LIMITS. REPAIRED IAW ABX-REA-5510-66185-00.