What was found
DURING C-CHECK, CORROSION WAS FOUND ON SKIN AROUND SCREW HOLES AND CORRODED NUTPLATES AT THE ADF ANTENNA LOCATION. MAINTENANCE REMOVED CORROSION ON SKIN AT THE ADF ANTENNA LOCATION, .002" MATERIAL LOSS, WITHIN LIMITS OF SRM 53-23-01, PERFORMED HFEC INSPECTION. NO DEFECTS NOTED. R & R 4 NUTPLATES IAW SRM 51-40-02. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.