What was found
AFT CARGO BAY FR 54-FR 54.1, S56L STRINGER CORRODED. REMOVE THE RELATED FASTENERS IAW SRM 51-40-21. BLEND OUT THE CORROSION IAW SRM 51-74-10 & APPLY ALODINE IAW SRM 51-21-10. MEASURE THE REMAINING THICKNESS IAW NTM 51-10-04 & CHECK FOR CRACK IAW NTM51-10-08, THE REMAINING THICKNESS IS 0.144 INCHES AND NO CRACK FOUND. THE ORGINAL THICKNESS IS 0.157 INCHES IAW DAN 51B-2 AND THE CLEANUP DEPTH IS LESS THAN HALF THE ORIGINAL THICKNESS, SO IT NEED TO REINFORCE THE STRINGER. MAKE THE REPAIR PARTS AND INSTALL THE REPAIR PARTS IAW SRM 53-10-14-201, FIG 203. RESTORE FINISH IAW SRM 51-75-10 AND APPLY CIC TO THE REPAIR AREA IAW SRM 51-23-00. THIS IS CATEGORY B REPAIR AND IT MUST BE INSPECTED AT DEFINED INTERVALS SRI53-10-14-2-008-00.