As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE REMOVED DUE TO N1 SHAFTING INSPECTION AND 4 EACH COMPRESSOR MOUNT STUDS PULLED. UPON INSPECTION OF COMPRESSOR PARTS NOTED THE FOLLOWING: WEAR ON THE SPLINE ADAPTER RETAINING RING GROOVE AFT FACE. INTERFERENCE FIT BETWEEN I.D. OF SPLINEADAPTER GROOVE AND RETAINING RING O.D. WAS .016" AT TIME OF NEW PART INSTALLATION. INSTALLED NEW SPLINE ADAPTER.