What was found
DURING ACCOMPLISHMENT OF AD 85-24-02, RAM AIR PLENUM CORROSION INSPECTION. CORROSION WAS FOUND ALONG THE LEFT SIDE WING BOX CENTER SECTION AT STR 4C AND LBL 36.5. THE CORROSION WAS BLENDED OUT AND A DOUBLER WAS INSTALLED. THE AREA WAS REPAIRED IAW BOEING ENGINE LETTER AOC-OKC-98-051RR DATED 6-2-98 BY AAR OKLAHOMA CITY. STRUCTURAL SUBSTANTIATION OF REPAIR PLAN IS AN AMOC TO AD 85-24-02. THE AREA WAS RESTORED TO NORMAL AND ACFT RETURNED TO SERVICE. (X)