As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI, PROPELLERS WERE MAKING A MODULATION SOUND. PILOT CHECKED THE PROPELLER RPM GAUGES AND FOUND THAT THE RT PROPELLER WAS IN AN OVERSPEED CONDITION. TAKEOFF WAS ABORTED. R & R NR 2 N/P PROBE IAW MM 72-00-00, PERFORMED MAX POWER (PROP = 1202RPM) AND PROP OVERSPEED TEST, OPS CHECK AND LEAK CHECKED GOOD.