As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PHASE 1 INSPECTION, SECTION II ITEM 2 CLEANING SPLINES ON BLOWER SHAFT AND ADAPTER. SPLINES HAVE SLIGHT STEP WORN INTO THEM AT FLANGED END OF ADAPTER. THIS SMALL STEP PREVENTS ADAPTER FROM SLIDING FREELY ON BLOWER SHAFT SPLINES WHEN SUBJECT TO TORSIONAL LOAD OF DRIVESHAFT TURNING.