As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS REMOVED DUE TO GEAR PROBLEM. STARTER TURNS BUT COMPRESSOR NOT ENGAGED TO STARTER. TEARDOWN INSPECTION REVEALED A SHEARED SHAFT BETWEEN THE FORWARD AND AFT GEARS OF CENTRIFUGAL BREATHER GEAR. PART IS BEING HELD FOR FAILURE ANALYSIS.