As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER AFT RUDDER ASSEMBLY LT UPPER SKIN FOUND WITH CORROSION AT APPROX ZAR 554.920. CORROSION REMOVED PER SRM 51-21-01-0G AND FOUND EXCEEDED ALLOWABLE LIMITS AS PER SRM 55-00-00-2R FIG 202. ORIGINAL THK 0.016", THK REMOVED 0.015", THK REMAINED 0.001". CARRIED OUT REPAIR AS PER SRM 55-40-01-2R FIG 201 REPAIR 2 AND EA 1-5540-T0341022 P1. REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100.