What was found
DURING AFT DECK PLATE REPLACEMENT, FOUND FLOORBEAM AT STATION 1681, RBL 45 - RBL 48, CORRODED ON UPPER FLANGE. R & R STATION 1681 FLOORBEAM FROM MAT TYPE PN BAC 518-827A, BATCH 2699793 IAW DWG 146N5091 & SRM 51-10-02, 53-00-51-01, 51-40-02, 51-20-01 & MM 51-21-10 & G GMM 7-0-1001. PRIOR TO FLOORBEAM REPLACEMENT, FOUND TO BE OUT OF LIMITS AFTER CORROSION REMOVAL IAW SRM 51-10-02 & SRM 53-00-51-01 FIG 101 DETAIL IV MAJOR REPAIR.