What was found
C2 CHECK - LT OTBD FLAP UPPER SKIN IS CHAFED BETWEEN WING STA Y209.00 AND Y281.00. BLENDED AREA IAW SRM 57-52-30-02-01. MIN THICKNESS REMAINING .029" REF NTM 51-00-02-250-801. CONFIRMED AFFECTED AREA CRACK FREE REF NTM 51-00-01-250-801. FOUND TO BE WITHIN LIMITS IAW RD 8/4-57-1466. FABRICATED SHIMS FOR FLAP SHROUD IAW SRM 57-50-40 STEP 7((A)1-3). TREATED AND PRIMED SHIMS IAW SRM 57-50-40 STEP 7((A)4). INSTALLED SHIMS REF SRM 57-50-40. INSTALLED POLYURETHANE/ACRYLIC TAPE AND COMPLETED REPAIR IAW TASK CARD RD 8/4-57-1466.