What was found
DURING ROUTINE C-CHECK INSPECTION, A CORROSION BULGE WAS FOUND BETWEEN FUSELAGE STATIONS 1723 AND 1745, LONGERON 23 LEFT. REPAIR ACCOMPLISHED REMOVAL OF THE DAMAGED AREA, FABRICATION AND INSTALLATION OF AN INTERNAL FILLER AND AN EXTERNAL REPAIR DOUBLER IN ACCORDANCE WITH THE DOUGLAS STRUCTURAL REPAIR MANUAL 53-2-1.