What was found
DURING BASIC CHECK AT EAMS, INSPECTION DISCOVERED CORROSION DAMAGE ON THE FR90 CROSSBEAM (P/N 170-66327-005) UPPER FLANGE. THE CORROSION DAMAGE AFTER BLEND-OUT MEASURES APPROXIMATELY 6.5 INCHES X 5.8 INCHES X .030 INCH DEEP -100% AROUND THE LIGHTENING HOLE. (REF FIGURES 1 AND 2). THE PERMANENT REPAIR ACCOMPLISHMENT BY DIRECT REPLACEMENT OF THE CORRODED CROSSBEAM FR90 WILL BE ACCOMPLISHED PER ORIGINAL PRODUCTION DRAWINGS AND SRM STANDARD PRACTICES. SUPPLEMENTAL FOLLOW UP INSPECTIONS ARE NOT REQUIRED DUE TO DIRECT REPLACEMENT OF THE PART. COMPASS ENGINEERING HAS CLASSIFIED THIS REPAIR AS A MAJOR REPAIR. EO E175-53MR-434 IS BEING ACCOMPLISHED BY WO 2706271.