As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROPELLER S/N HL259 WAS RETURNED FOR A LOOSE BLADE. AFTER DISASSEMBLY, INSPECTION REVEALED 1 BROKEN A-3204-1 PRELOAD SET SCREW. THE SCREW WAS BROKEN INTO TWO PIECES WITH THE B-3368 LOCKNUT STILL ATTACHED TO THE INBOARD SECTION OF THE BROKEN A-3204-1 SCREW. THE SCREW WAS REMOVED, SENT TO HARTZELL ENGINEERING FOR EVALUATION AND REPLACED WITH NEW.