What was found
DURING B-4 CHECK, FOUND RIVET POPPED AT FUSELAGE STATION -12, LEFT LONGERON NR 30. INVESTGATION REVEALED STRESS CRACK IN FUSELAGE SKIN AT RIVET HEAD. REMOVED DAMAGE SKIN, CLEANED AND TREATED IAW DC8 SRM 51-1-8 AND REPAIRED IAW DC8 SRM 53-2-0 /51-1-21 AND REFINISHED.