As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, R/H HORIZONTAL STAB UPPER SURFACE REAR SPAR HAS COROSION BLISTER OF APROX 5" LONG AT 95" FROM FUSELAGE BODY. (AROUND FASTERNERS) FOUND CORROSION BTWN RS STA 104.105, UPPER REAR SPAR AREA AND STRG 1. CORROSION WAS BLENDED IAW SRM. ENGINEERING CONTACTED FOR FURTHER EVALUATION AND REPAIR APPROVAL. DAMAGE REPAIRED IAW FVCI EO 26099-6, & ABX-REA-5513-66199-00.