As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE TOOTH ON GEAR SEPARATED AND LODGED BETWEEN CRANKSHAFT GEAR AND OIL PUMP HOUSING. THIS CAUSED THE REMAINING TEETH OF THE CRANKSHAFT GEAR TO ROUND OFF AND DISENGAGE FROM THE OTHER GEARS. THIS ALSO CAUSED 2 IDLER GEARS AND THE OIL PUMP DRIVE GEAR TO SHEAR SEVERAL TEETH AS WELL.