As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WOULD NOT MAKE RED LINE RPM OR CYCLE. GOVERNOR REMOVED, DRIVE GEAR WOULD NOT TURN. GOVERNOR DISASSEMBLED AND FOUND BA59 BEARING FAILED AS DESCRIBED IN AD 2020-19-06 AND MCCAULEY ASB273C. GOVERNOR OVERHAULED 30/NOV/2017 USING A NEW MCCAULEY A20107 IDLER GEAR ASSEMBLY WITH THE SUSPECT VARIANT BEARING INSTALLED. GOVERNOR IS DAMAGED BEYOND REPAIR.