As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RIGHT HORIZONTAL STABILIZER DEICE BOOT REPLACEMENT, INSPECTORS FOUND 8 INCH CRACK UNDER DEICE BOOT ON HORIZONTAL STABILIZER LEADING EDGE SKIN. PROCEDURE FOR REPAIR FOUND IN MU2 STRUCTURAL SRM. FIELD APPROVAL OF DATA C/W AND REPAIR MADE. INSPECTION OF THIS AREA RECOMMENDED WHERE DEICE BOOT REMOVED OR USE (SQUEEZE TEST) TO FIND SOME DEFECTS WITH DEICE BOOT ON.