As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOTS CONTROL WHEEL EMITS A GRINDING NOISE WHEN OPERATING THE AILERONS. FOUND THE AFT AILERON CONTROL CABLE WAS FOUND TO BE INCORRECTLY ROUTED INSIDE THE PILOTS CONTROL COLUMN. THE CABLE TENSION WAS LOW AND THE TURNBUCKLE WAS ADJUSTED TO THE END OF ITS TRAVEL.