What was found
DURING ROUTINE C CHECK, FOUND HORIZONTAL STIFFENER CRACKED APPROXIMATELY 1 INCH AT STATION 1956 LEFT SIDE. REMOVED FASTENERS AS NEEDED TO REMOVE STIFFENER. REMOVED DAMAGE. FABRICATED DOUBLER, LOCATED, DRILLED, TRIMMED, DEBURRED, TREATED, PRIMED, INSTALLED DOUBLER AND NEW FASTENERS, REINSTALLED STIFFENER AT STATION 1956 IAW DC8 SRM 53-2-0, 51-1-21, 53-5-3, 51-1-20D, AND 51-1-8.