What was found
DURING ROUTINE C CHECK, FOUND NUMBER 1 ENGINE PYLON LOWER AFT SECTION HAS CRACKED RIB ANGLE VERY AFT RIB. REMOVED FASTENERS AS NEEDED TO REMOVE DAMAGED RIB ANGLE. FABRICATED NEW RIB ANGLE, LOCATED, DRILLED, TRIMMED, DEBURRED, PRIMED. INSTALLED NEW RIB ANGLE AND NEW FASTENERS IAW DC8 SRM 51-1-4, 54-2-0 AND 51-1-8.