As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED RT PROPELLER OVERSPEED INDICATION ON CLIMB OUT, THEN DIFFICULTY CONTROLLING THE PROPELLER AT A STEADY RPM AFTER THAT POINT. R & R THE RT ENG PROPELLER GOVERNOR, OPERATIONAL & LEAK CHECKED GOOD WITH NO FURTHER DEFECTS AT THAT TIME.