What was found
C11 SYS 6 CHECK LEVEL 2 EXFOLIATION CORROSION ON AFT CABIN FLOOR STRUCTURE Z BEAM CTR SECTION BETWEEN FRAME 66 TO FRAME 68, Z 500 & Y 1292. REPLACED AFT CABIN FLOOR STRUCTURE Z BEAM CTR SECTION BETWEEN FRAME 66 TO FRAME 68, Z 500 & Y 1292 IAW SRM 51-72-11, 51-40-00 & DWG D53472780.