As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISASSEMBLY OF THE PROPELLER GEARBOX REVEALED THE LT IDLER GEAR (775753-5 ITEM 40 OF FIG 5 IN MANUAL 72-11-02) WEB FAILED AND THE GEAR HAD BROKEN THROUGH THE GEARBOX HOUSING. THE FORWARD INPUT ROLLER BEARING (775765-1 ITEM 180 OF FIG 8) HAD BROKEN AND THE ROLLERS FOUND IN THE BOTTOM OF THE GEAR CASE.