What was found
DURING OP 16 MAINT CHECK, FOUND COCKPIT VERTICAL STIFFENER NUMBER 9911503-167 WAS CRACKED IN THE RADIUS APPROXIMATELY 1.5 INCH LONG, APPROX 2 INCHES BELOW TOP OF STIFFENER AT STA 69.5, AFT SIDE OF BULKHEAD ON X=-12 ON RT SIDE. MADE UP DOUBLER AND INSTALLED PER ARA 13513.