What was found
DURING ROUTINE C CHECK, FOUND AFT SERVICE DOOR BEAM NUMBER 1 CRACKED AT AFT SECTION. REMOVED SERVICE DOOR. REMOVED FASTENERS AS NEEDED TO REMOVE DAMAGED BEAM. FAB`D NEW BEAM. LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, INSTALLED NEW BEAM NUMBER 1 AND FASTENERS IN AFT SERVICE DOOR. INSTALLED AFT SERVICE DOOR, RIGGED, AND LEAK CHECKED IAW DC8 MM 52-10-12, 52-10-16, 52-10-05, 21-30-05, DC8 SRM 52-1-0, 51-1-4, 51-1-5, AND 51-1-8.