As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE ANNUAL INSPECTION, THE HORIZONTAL STABILIZER ASSEMBLY WAS FOUND CORRODED BEYOND ECONOMICAL REPAIR LIMITS. INTERNAL PORTION OF STABILIZER ASSY IS VERY DIFFICULT TO INSPECT WITH THE ELEVATOR ASSY INSTALLED. SUBMITTER RECOMMENDS EXTRA EFFORT TO THOROUGHLY INSPECT THE INTERNAL PORTION OF THE STABILIZER ASSY DURING ANNUAL INSPECTIONS.