What was found
DURING C-CHECK, RT FUSELAGE SKIN CRACKED AT FRAME 77 BETWEEN STRINGERS 5-7R. MX REPAIRED RT FUSELAGE SKIN IAW EC5330-02501, REV ORIG, FILLER AND DOUBLER INSTALLED. ALODINED, PRIMED AND PAINTED IAW CPM 51-21-06. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.