As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER SECTION SUN GEAR FAILED AS ALL TEETH WORE OFF CAUSING FAILURE OF THE POWER SECTION AND BOTH POWER TURBINE DISKS TO BREAK LOOSE CAUSING ADDITIONAL COLLATERAL DAMAGE TO THE POWER SECTION, EXHAUST DUCT AND COMPRESSOR TURBINE DISK ASSY. INCIDENT HAPPENED ON TAKEOFF CAUSING ACFT TO MAKE AN EMERGENCY LANDING. ENGINE WAS CURRENTLY OPERATING UNDER SB 807 WHICH REQUIRED 25 HOUR INTERVAL INSPECTIONS OF MAGNETIC CHIP DECTECTORS. OPERATOR CLAIMED TO BE IN COMPLIANCE.