As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GDV - ENGINE HARD TO PULL THROUGHT AND NOISEY. FOUND AFT TURBINE NUT (P/N 865082-1) BROKEN ALLOWING TURBINE RUB. PERFORMED COMPLETE ENGINE TEARDOWN AND INSPECTION FOR DAMAGE. PARTS WILL BE REPLACED AS REQUIRED AND MAINTENANCE CHECKS COMPLETED. (M)