As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING AN ANNUAL INSPECTION OF THIS AIRCRAFT, SEVERE CORROSION WAS NOTED ON THE AFT UPPER TRAILING EDGE SPAR CAP ON THE HORIZONTAL STABILIZER AT APPROXIMATELY SS 80.60 LEFT HAND AND ARIGHT HAND SIDES. THE CORROSION HAS GONE THROUGH THE SPAR CAP BUT HAD NOT YET DAMAGED THE WEB. THIS CORROSION WAS NOT INITIALLY NOTICED DUE TO THE FACT THE CORROSION HAD BEEN PAINTED OVER THE ENTIRE SPAR CAP WAS REPLACED.