As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT INBOARD HORIZONTAL STABILIZER LEADING EDGE SECTION OUTBOARD UPPER SURFACE AT XSTA 177, HAD INTERGRANULAR CORROSION AT SCREW HOLE AREA. INSTALLED REPAIR AT LEFT INBOARD STABILIZER LEADING EDGE SECTION OUTBOARD UPPER SURFACE IAW REA D855-53575-MR, REV. B.