As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTED ACFT IAW SB-GL12-01R. AFTER REMOVING THE RT HORIZONTAL STABILIZER, A CRACK WAS DISCOVERED ALONG THE INBD RIVET LINE WHICH COVERED APPROX 70 DEGREES OF THE TUBE CIRCUMFERENCE. THE LT HORIZONTAL STABILIZER WAS FOUND TO BE CRACKED THE ENTIRE CIRCUMFERENCE OF THE TUBE, INBD OF THE SECOND LINE OF RIVETS.