As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL OF FLIGHT NR 1120 THE CREW FELT LEFT RUDDER DEFLECTION AND VERIFIED THE RUDDER BOOST SYSTEM WAS MALFUNCTIONING. THEY ABORTED TAKEOFF, RETURNED TO MKE AND MAINTENANCE DEFERRED THE SYSTEM. SUBMITTER STATES, CONTACTED OPERATOR THIS WAS NOT A FULL DEFLECTION. (M)