What was found
(CAN) AT TAKE OFF POWER, THE PILOT OBSERVED PROPELLER SPEED AND TORQUE FLUCTUATIONS. DURING THE TROUBLESHOOTING, THE OVERSPEED GOVERNOR WAS CHANGED AND FLUCTUATIONS PERSISTED. TROUBLESHOOTING IS ONGOING.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) AT TAKE OFF POWER, THE PILOT OBSERVED PROPELLER SPEED AND TORQUE FLUCTUATIONS. DURING THE TROUBLESHOOTING, THE OVERSPEED GOVERNOR WAS CHANGED AND FLUCTUATIONS PERSISTED. TROUBLESHOOTING IS ONGOING.