As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER OSCILLATED IN CRUISE FLT AND THROUGHOUT DESCENT. YD FAIL UPPER B CAME ON DURING THE FLIGHT AND REMAINED ON, OSCILLATION STOPPED AFTER SLOWING BELOW 300KTS. [07-13-07] REMOVED AND REPLACED THE UPPER RUDDER CHANNEL B POSITION SENSOR. OPS CHECKED GOOD IAW CESSNA 750 MM CHPT 27-24-01.