As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A START FOR THE FIRST FLIGHT OF THE DAY, THE AIRCRAFT FAILED TO START. INVESTIGATION BY MAINTENANCE REVEALED A SHEARED DRIVE. THIS IS THE FIRST TIME WE HAVE EVER SEEN THIS HAPPEN. WE HAVE NOT SENT THE STARTER GEN OUT FOR REASON FOR THE BROKEN SHAFT. IF THERE IS FURTHER INFORMATION TO SUPPLEMENT, WE WILL SUBMIT THAT INFORMATION.