What was found
DURING C-CHECK FOUND SEVERAL LOWER FUSELAGE ANTENNAS WITH CORROSION: MKR 1/TDR 1/ DME 2/ RADAR ALT/ TDR 2. REPLACED DME AND MARKER BEACON ANTENNAS. FUNCTION CHECKED FOLLOWING SYSTEM: DME 1 & 2 IAW 34-51-00, ATC 1 & 2 IAW 34-52-00, MARKER BEACON 1 & 2 IAW 34-55-00, RADIO ALTIMETER IAW 34-42-00, VHF 2 IAW 23-15-00. ALL SYSTEMS CHECK GOOD.