As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE HEAVY MAINTENANCE VISIT, CORROSION WAS FOUND ON THE LUG HOLE AND SURFACE OF THE VERTICAL STABILIZER UPPER CLOSURE RIB FITTING. THE LUG BORE WAS OVERSIZED AND THE SURFACE SPOTFACED TO REMOVE CORROSION. AN OVERSIZED BUSHING WAS INSTALLED TO RESTORE THE HOLE TO THE ORGINAL DIMENSIONS. THIS REPAIR WAS CLASSIFIED AS MAJOR AND APPROVED BY BOEING DER WITH AN 8110-3.