What was found
DURING C-CHECK INSPECTION IN BNA, THE LOWER FUSELAGE WAS FOUND CORRODED ON THE EXTERNAL SKIN BETWEEN FRAMES 7 AND 8 WHERE THE DME ANTENNA MOUNTS BETWEEN STRINGERS 21 LEFT AND 21 RIGHT. MAINTENANCE REMOVED CORROSION IAW CPM 51-14-00. A NEW INSIDE DOUBLER WAS FABRICATED IAW SRM 51-25-00. INSTALLED PER SRM 51-40-02. AN EXTERNAL DOUBLER WAS FABRICATED IAW SRM 53-00-01 AND INSTALLED IAW SRM 51-40-02. AIRCRAFT WILL RETURN TO SERVICE UPON COMPLETION OF C-CHECK. (M)