As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE IDG MAIN FEEDER CABLE IS CHAFED THRU THE INSULATION ABOUT 12 INCHES FROM THE IDG TERMINAL LUGS. THERE ARE SOME SIGNS OF ARCHING ON THE FASTENER THAT CAUSED THE CHAFING. INSPECTED AND FOUND DAMAGE WITHIN LIMITS PER SWPM 20. WRAPPED CABLE WITH CHAFE TAPE AND REPOSITION HARNESS AWAY FROM CHAFE POINT.