As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIDDEN CORROSION: CORROSION WAS FOUND ON RT HORIZONTAL STABILIZER REAR SPAR LWR BARREL NUT HOLE DURING REAR SPAR CAP REMOVAL IN REF NRC 00100. LEVEL CORROSION 2. CORROSION ON RT HORIZONTAL STABILIZER REAR SPAR LWR BARREL NUT HOLE WAS REPAIRED PER SRM 55-03D PARA 30.