What was found
DURING C-CHECK, CORROSION WAS OBSERVED ON THE RT WING UPPER SURFACE SKIN PANEL NR 1 AT WS 434 OVER UPPER RIB FLANGE PIN 113T1545-6, THE DAMAGE WAS REMOVED BY BLENDING AFFECTED AREA IAW SRM 51-10-02 WITH MEASURED MATERIAL REMAINING OF0.112 INCHES FROM INITIAL THICKNESS OF 0.205", INCH (UT MEASURED) WITH MATERIAL LOSS OF 0.093 INCH (45%), FOUND TO BE OUT OF LIMITS IAW SRM 57-20-01, ALLOWABLE DAMAGE 1, TABLE I OF 0.035 INCHES. ADDITIONALLY, A CRACK WAS FOUND IN THE BLENDED AREA WITH APPROXIMATE LENGTH OF 2.5", SEE FIGURE 1 FOR MORE DETAILS. MANUFACTURER WAS CONTACTED PER SR PEF-ABX-26- 00121 AND PERMANENT REPAIR INSTRUCTIONS WERE PROVIDED. REPAIRED IAW ABX-REA-5725-66202-00.