What was found
RIGHT LOWER WING SKIN CRACKED AT ACCESS PANEL 643BB. STARTED TO REMOVE FASTENERS INSIDE FUEL CELL AREA AS REQUIRED. REMOVE DAMAGED PANEL P/N757-3401-2 IAW SRM 51-40-02 AND DRAWINGS LISTED ON AVO16784. CONTINUED REMOVING FASTENERS. REMOVED DOUBLER REPAIR. REMOVED BLIND FASTENERS ON LEADING EDGE, CONTINUED REMOVING FASTENERS. REF SRM 51-40-02 CONTINUED REMOVING FASTENERS IN RIB 25 AND RIB 26. REMOVED FINAL FASTENERS & STARTED TO SEPERATE LOWER SKIN. SKIN REMOVED CONTINUED TO REMOVED ADDITIONAL FASTENERS & REMOVED DAMAGED RT WING LOWER SKIN. CONTINUED CLEANING HOLES ON FRONT SPAR AND AFT SPAR. CONTINUED CLEANING HOLES, REMOVED ATTACHMENT FROM OLD SKIN. INSPECTION-ACPD HFEC ROTO INSPECTION OF LWR AFT SPAR & LWR FWD SPAR & FIXED WING LWR CORD IAW NTM PART6 51-00-04. ACP STEPS 5,6,7 OF AVO 16784 .DETAIL VISUAL AND HFEC (6) 51-00-16 AND (6) 51-00-17 OPEN HOLE INSPECTION. NO CRACKS. BEGAN REMOVING EXISTING SEALANT FROM REPAIR AREA CONTINUED REMOVING EXISTING SEALANT FROM REPAIR AREA COMPLETED MFG. OF TEMPLATE FOR LOWER SKIN FASTENER HOLES. LOCATED FOUR HOLES ON NEW SKIN AND BACK DRILLED. NEEDS TO FINISH TRIM IN/ BD END OF SKIN PANEL MOVED WEIGHT TOTALING 450 POUNDS INBOARD OF UPPER OUTBOARD SKINMAJOR REPAIR HAS BEEN ACCOMPLISHED REF ECRA 5720-03639.