As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE ORD-EWR, RECEIVED RUDDER 1 AND RUDDER 2 WARNINGS ON CLIMB-OUT. RETURNED TO ORD WITHOUT FURTHER INCIDENT. ACCOMPLISHED BITE CHECK OF AFCAS. SUSPECT RUDDER LIMITER MONITOR UNIT DEFECTIVE. REPLACED RCMU. ACCOMPLISHED STICKING SWITHC TEST AND TEST 40. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)