What was found
THE FOLLOWING CORROSION WAS DISCOVERED DURING B, C INSPECTIONS: FUSELAGE FORWARD LOWER SECTION - CORROSION BETWEEN SKIN AND FRAMES/STRINGERS. FRAME 7 TO FRAME 19 ON PANELS BETWEEN S22L AND S22R. REPLACEMENT OF BOTH SKIN PANELS AND CLEANING AND TREATING OF ATTACHING SKINS. SUBMITTER SUGGESTED CONDENSATION AND MOISTURE RETAINED BY SOUNDPROOFING COULD BE A POSSIBLE CAUSE. ACFT TT: 28,446 HRS. LANDINGS: 23,592.