What was found
DURING C18 CHECK INSPECTION, A CRACK WAS OBSERVED AT STRINGER S18L END, BS 676 POINTING AFT. THE DAMAGE IS LOCATED AT THE STRINGER WEB EXTENDING ABOUT 1 INCH. THE AFFECTED STRINGER SPLICES TO THE MAIN DECK CARGO DOOR SURROUND STRUCTURE. TRIMMED OUT THE DAMAGED PORTION OF THE AFFECTED STRINGER BETWEEN BS 698 AND 720. PERFORMED HFEC INSP OF TRIM OUT AND 3 INCHES AROUND IT TO INSURE A CRACK FREE CONDITION PER B767 NDT PART 6. TOUCHED UP EXPOSED EDGE OF STRINGER TRIM OUT AND ANY BARE AREA OF THE SURROUNDING STRUCTURE WITH CHEMICAL CONVERSION COATING IAW SRM 51-20-01. INSTALLED REPAIR PARTS AS SHOWN IN FIG 3 OF IAI REPAIR EA MF00852R0003. THIS IS A CATEGORY B REPAIR IAW SRM 51-00-06.