What was found
DURING ROUTINE C CHECK INSPECTION, CORROSION WAS DETECTED ON MAIN CABIN FLOOR PRESSURE PANEL BETWEEN FUSELAGE STATION 863 AND 878, BL +X4 TO -X5.50. REPAIR ACCOMPLISHED CORROSION BLEND OUT, FABRICATION AND INSTALLATION OF A REPAIR DOUBLER IN ACCORDANCE WITH FAA DER APPROVED DRAWING COO-8-53-290-98 AND ENGINEERING ORDER 53-DC8-857.