What was found
INSPECTION TYPE-SI, SSID (F-12) HFEC INSP OF UPPER SURFACE OF INNER SILL CHORD OF MAIN CARGO DOOR AT LBL 70 WL 208 BODY STATIONS 488, 501, 510 TO 520 525, 535, 550, 570, 580, 590 AND 600 EXHIBITS CORROSION INDICATIONS. REMOVED CORROSION FROM SILL AND INSTALLED REPAIR DOUBLER IAW EWO NR 97-2130 UNDER UPS FILE NR 727-53-1895.