As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) AIRCRAFT EXPERIENCED AN UNCOMMANDED INCREASE IN PROPELLER RPM AND FAILED TO RESPOND TO FURTHER COMMANDS. INVESTIGATION FOUND THAT THE STAINLESS STEEL SHAFT END OF THE PROPELLER PITCH CONTROLCABLE HAD FAILED THROUGH THE THREADS LEVEL WITH RODEND LOCATEDNEAR THE PROPELLER GOVERNOR. SUSPECT INITIAL CRACKING WAS CAUSEDBY PREVIOUS INCORRECT RIGGING. PERSONNEL/MAINTENANCE ERROR.