What was found
PROPELLER, S/N HL113, WAS RETURNED FOR BROKEN PRELOAD SET SCREW. AFTER DISASSEMBLY, INSPECTION REVEALED 1 BROKEN A-3204-1 PRELOAD SET SCREW. THE B-3368 LOCKNUT WAS STILL ATTACHED TO THE INBOARD SECTION OF THE A-3204-1 SCREW. THE SCREW AND SPRING WERE REMOVED, SENT TO HARTZELL ENGINEERING FOR EVALUATION AND REPLACED WITH NEW. THE C-6066-1 PRELOAD PLATE THREAD WAS DAMAGED, BUT WITHIN ACCEPTABLE LIMITS AND THE PLATE WAS REPAIRED AND RETURNED TO SERVICE.