As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ENGINE REMOVED DUE TO TURBINE DAMAGE. TEARDOWN REVEALED 2 TURBINE INTERSTAGE CASE MOUNTING BOLTS FAILED DUE TO CORROSION ON THE MOUNTING FLANGE. BOLTS HAD BEEN INSTALLED NEW AT SHOP VISIT 1792 HOURS P REVIOUS. THE CAUSE OF THE CORROSION COULD NOT BE ASCERTAINED. THIS INTERSTAGE CASE IS PRE SB 21175.