As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED THAT HE WAS HAVING HARD TIME STARTING BUT ENGINE WAS ALMOST RUNNING SO HE ADDED POWER TO THROTTLE AND THEN SUDDENLY JUST WIND MILLING PROPELLER. GEARBOX WAS REMOVED AND IT WAS DISCOVERED THERE IS A BROKEN GEARBOX DRIVE SHAFT. CORRECT MONITORING LOOM INCL. FW/MAPPING IS INSTALLED. (TC# 20190411012)