What was found
DISCREPANCY: DURING C-CHECK AT KDHN, FOUND ON THE UPPER MAIN CARGO DOOR FS313L TO 332L ABOVE WINDOW FRAME, SKIN IS CRACKED ALONG RIVET ROW. CORRECTIVE ACTION: COMMERCIAL JET STOP DRILLED CRACK AND VERIFIED CRACK CONTAINMENT VIA NDT. FABRICATED, DRILLED, DEBURRED, TREATED, PRIMED AND INSTALLED 1 EACH 0.100 DOUBLER AND 0.025 FINGER DOUBLER IAW DC9 SRM 51-10-3, 51-30-0 AND BOEING DRAWING J060109.