As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IP STATED THAT THEY ATTEMPTED TO ADJUST THE THROTTLE MULTIPLE TIMES FOLLOWING TAKEOFF WITH LITTLE TO NO RESPONSE IN PROP SPEED. INSPECTED PROPELLER GOVERNOR CONDITION AND FOUND TO BE MECHANICALLY JAMMED AT MAX SETTING. INSTALLED OVERHAULED GOVERNOR P/N: P-877-16.