What was found
WHILE 764CK WAS UNDERGOING C 4 -CHECK IN OSC, CORROSION WAS FOUND ON THE INNER SURFACE OF THE INNER SKIN AT STA 1177 ALONG THE S-36L LAP JOINT. SEE FIGURE 1. THE CORROSION WAS REMOVED BY BLENDING AND THE BLEND WAS BEYOND THE ALLOWABLE LIMIT GIVEN IN B767 SRM 53-00-01, AD1, FIG 101. SINCE THIS DAMAGE IS UNDER THE WING-TO-BODY FAIRING, THERE IS NO REPAIR GIVEN FOR IT IN THE SRM. FLIGHT VEHICLES CONSULTING, INC. WAS CONTACTED FOR AN FAA-DER APPROVED REPAIR. THE PURPOSE OF THIS REA IS TO AUTHORIZE AND DOCUMENT ACCOMPLISHMENT OF FVCI EO 25166-3, WHICH IS AN FAA-DER APPROVED REPAIR.COMPLIED WITH ABX-REA-5365-65899-00 AND FVCI EO 25166-3.