What was found
AT C CHECK, AFT STAIRWELL LEFT SIDE HORIZONTAL WEB BETWEEN STA 1223 AND 1243 AREA OF STRINGER 12 O/B FWD LIGHTING HOLE STOP DRILL DEVELOPING CRACK. ROUTED OUT DAMAGED AREA AT AFT STAIRWELL. INSTALLED REPAIR PER SRM 51-40-2, 3 BY 3, N/R 3091.