As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED PROPELLER RPM VARIES DURING CLIMB-OUT. CONTROL CABLE, PROPELLER GOVERNOR AS WELL AS HUB AIR PRESSURE AND BLADE ANGLE WERE DETERMINED TO BE SERVICEABLE. SERVICEABLE PROPELLER WAS INSTALLED AND CHECK FLIGHT WAS OK. AWAITING OVERHAUL REPORT. (X)