As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERE CORROSION IN SKIN PANEL AT RIGHT HAND AFT FUSELAGE BETWEEN FRAMES 23 AQND 26 IN AN AREA BELOW ENGINE PYLON. CORROSION POSSIBLY DUE TO TRAPPED MOISTURE IN FOAM INSULATION BETWEEN FUSELAGE FUEL TANK AND STRUCTURE. REPLACED SKIN BETWEEN FRAME 23 AND 26, FS 281.5 - FS 326.57, PER FORM 337.