As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AM ENGINE RUNUPS, RT ENGINE WENT INTO FEATHER AND WOULD NOT COME OUT. ALL OTHER PARAMETERS NORMAL. AFTER FURTHER INSPECTION, DEMATED POWER SECTION FROM GAS GENERATOR AND DETERMINED THAT POWER TURBINE BLADES WERE BROKE OFF AT THE BLADE ROOT. POWER SECTION HAS MAJOR INTERNAL DAMAGE. REPLACED LT POWER SECTION MODULE AND ROUTED FAILED UNIT FOR FURTHER ANALYSIS AND REPAIR. NOTE: SUSPECT NR 2 PT BLADE FAILURE.