As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED INSPECTION OF THE HORIZONTAL STABILIZER SIDE ROLLER BRACKET ASSY AND AREA, IT WAS DISCOVERED THAT THE SUPPORTING BRACKETS BEHIND THE RIB ON THE RT SIDE AND THE RIBS WERE CRACKED. THE INITIAL INSPECTION WAS ACCOMPLISHED USING A BORESCOPE AND INSERTING THROUGH THE DRAIN HOLE ADJACENT THE SIDE ROLLERS. THE FOLLOWING PARTS WERE CHANGED PN45A21046-6 RIB, 45A21086-4, AND 45A21085-4 BRACKETS.