What was found
REMOVED PROPELLER TO REPLACE BROKEN LINK PIN UNIT. FOUND CORROSION ON BLADE. UPON FURTHER INSPECTION, FOUND CORROSION ON ALL THREE BLADES AND ANOTHER BROKEN SCREW IN ANOTHER LINK PIN UNIT. AFTER DISASSEMBLY, A PILOT TUBE WAS FOUND OUT OF POSITION. PROP HUB WAS SENT BACK TO FACTORY FOR REPAIR. SCREWS LOOK LIKE THEY WERE OVERTORQUED. THE PILOT TUBE DID NOT HAVE ENOUGH PITCH TO HOLD IT IN POSITION. SUBMITTER STATED MANUFACTURER NEEDS TO CHECK THEIR QUALITY CONTROL AND MANUFACTURE ASSY PROCEDURES.