As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON POST FLIGHT FOUND CLICKING NOISE EMINATING FROM TRUNNION CLAMP RING AREA. SUSPECT TRUNNION BEARING LOOSE IN YOKE, CAUSING NOISE WHEN BLADES ARE FLAPPED. MORE NOTICEABLE AFTER FLIGHT WHEN WARM, NOISE DIMINISHES AS YOKE COOLS. REPAIRED AND INSPECTED BY OVERHAUL SHOP.