As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDM FLIGHT NR 2054 ON TAXI OUT GOT A HOT MIC AGAIN, NARROWED IT DOWN TO CAPTAINS TILLER, WHEN TILLER MOVED FOR RIGHT TURN A HOT MIC HAPPENS WITHOUT PUSHING THE PTT SWITCH. MAINTENANCE REPLACED RILLER PTT SWITCH AND HARNESS. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVOCE.