As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER INSTALLATION OF SUPPORT ASSY, ENGINE MADE CHATTERING NOISE WHEN ROTATED. DISASSEMBLY SHOWED IMPROPER MACHINING OF SUPPORT ALLOWING SEGMENTS TO CONTACT TURBINE WHEEL BLADES. CAUSE: IMPROPER REPAIR. SUBMITTER SUGGESTS BETTER QUALITY CONTROL DURING REPAIR.