What was found
THE FOLLOWING CORROSION WAS DISCOVERED DURING B, C INSPECTIONS: FUSELAGE LEFT AFT SECTION LAVATORY AREA - CORROSION BETWEEN SKIN AND FRAMES/STRINGERS. FRAME 29 TO FRAME 33 LOCATED BETWEEN STR 19 AND STR 22. REPLACEMENT OF SKIN PANEL AND CLEANING AND TREATING OF ATTACHING SKIN, STRINGERS, AND FRAMES. SUBMITTER SUGGESTED MOISTURE AND SPILLAGE IN LAVATORY AREA AS A POSSIBLE CAUSE. ACFT TT: 28,446 HRS. LANDINGS: 23,592.