What was found
DURING ROUTINE C CHECK, FOUND AFT PASSENGER DOOR CUTOUT UPPER AFT CORNER CRACKED. REMOVED FASTENERS AS NEEDED TO REMOVE DAMAGE. FABRICATED REPAIR PARTS, LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, AND INSTALLED REPAIR PARTS AND NEW FASTENERS IAW DC8 SRM 53-2-0, 51-1-8, AND 51-1-20D.