What was found
DURING ROUTINE C CHECK, FOUND AFT FUSELAGE LONGERON ATTACH FITTING CRACKED AT STATION 1690 LONGERON 28 LEFT. REMOVED FASTENERS AS NEEDED TO REMOVE DAMAGED FITTING. FABRICATED NEW FITTING, LOCATED, DRILLED, TREATED, PRIMED, INSTALLED NEW LONGERON ATTACH FITTING AND FASTENERS AT STATION 1690 LONGERON 28 LEFT IAW DC8 MM 20-16-0, DC8 SRM 53-2-0, 51-3-1, AND 51-1-8.