As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FAILED TO START. ON INVESTIGATION OF PROBLEM, FOUND STARTER CENTRIFUGAL SWITCH HAD MALFUNCTIONED. ORDERED NEW STARTER. WHEN OLD STARTER WAS REMOVED, IT WAS DISCOVERED THAT THE STARTER SHAFT BEARINGS HAD FAILED, THIS IS MOST LIKELY WHAT TOOK OUT THE CENTRIFUGAL SWITCH.