What was found
MAIN CABIN FLOOR STRUCTURE UPPER FLANGE HAS CORROSION BETWEEN FS 12A & 13A LBL18". REMOVED CORROSION AT MAIN CABIN FLOOR STRUCTURE UPPER FLANGE BETWEEN FS 12A & 13A LBL18 IAW A300 SRM 51-40-11 MAT LOSS .018 MAT REMAINING .062 ORIGINAL MAT .080. FOUND OUT OF LIMITS AS PER A300 SRM 53-10-00, REMOVED SECTION OF T STRUCTURE FLOOR SUPPORT FROM FS 13L TO FS 14L AS PER A300 SRM 53-12-00. FAB NEW SECTION FROM STRUCTURE ANGLE T#-22647 AND SPLICE FROM L ANGLE 60-9271 AS PER A300 SRM 51-10-40. TREATED AN PRIMED AS PER A300 SRM 51-40-12 AND INSTALLED IAW A300 SRM 51-30-30.