As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON FLIGHT 2131 ROLL CONTROL VERY STIFF AND SLUGGISH. MORE PRONOUNCED WHEN ROLLING TO THE LEFT. NOTICED DURING DESCENT THROUGH THE LANDING PHASES OF FLIGHT. MAINTENANCE INSPECTED THE SYSTEM AND RIGGED THE RIGHT AILERON TAB AND REPLACED THE TRIM TAB SPRINGS. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.