As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A VIBRATION WAS FELT IN THE YOKE DURING CLIMB AT FLIGHT LEVEL 350. SPEED WAS 280KTS. WENT AWAY AFTER CLIMB WAS STOPPED. FOUND NO TENSION ON CABLE AND JAM NUTS LOOSE. SYSTEM WAS RIGGED, DEFLECTION TRAVEL WAS CHECKED AND TENSIONS SET AND SECURED.