What was found
DURING "A" CHECK INSPECTION, THE AFT FUSELAGE SKIN WAS FOUND TO BE CRACKED AT A RIVET BELOW STRINGER 4R AT FR78. MX REMOVED THE DAMAGE, AND PERFORMED A FILLER/DOUBLER REPAIR IAW ENGINEERING CHANGE AND REPAIR AUTHORIZATION EC5330-02501, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.