As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MODULE 2 & 3 WERE REMOVED FOR REAR BEARING CLEANING. DURING A GENERAL INSPECTION OF THE 2ND STAGE TURBINE AND FREE TURBINE BLADES AND LOCKS, ALLOWED. DUE TO THIS ACCESS, THE 2ND STAGE TURBINE SHOWED VISUAL SIGNS OF BLADE MOVEMENT WITH LOOSE LOCKS. UNDER ADVISE OF MFG TECH, INSP WAS COMPLETED WHICH DEMONSTRATED THAT THE BLADE PLATFORM HEIGHT WAS OUT OF LIMITS AT .65MM.( .40 MM MAX ALLOWED) MODULE 2 AND 3 RETURNED FOR REPAIR.