As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH SPEED ABORTED TAKEOFF DUE TO HIGH PICH SQUEAL THROUGH BOTH HADSETS ON COM1 HAD TO ABORT TAKEOFF SQUEAL HAPPENED AROUND 80KTS ABORTED TAKEOFF BETWEEN 80-100 KTS NORMAL BRAKING APPLIED PLENTY OF RUNWAY LEFT. FOUND CPTN HAND MIC JACK TO HAVE BROKEN WIRE CONNECTION. REPAIRED CONNECTION IAW SWPM 20-30-00. OPC GOOD IAW 23-51-00