As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED FAILED BOLTED JOINT INSPECTION. WHEN DISASSEMBLED IT WAS DISCOVERED THERE WERE 2 BROKEN BOLTS AND SEVERE SCUFFING ON SPIRAL BEVEL RING GEAR AND SPIRAL BEVEL PINION GEAR. THE FIRST STAGE SUN GEAR HAD ONE SPALLED GEAR TOOTH CAUSING COMPLETE DISASSEMBLY OF THE TRANSMISSION.