As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE LEVELING OFF AT 8,000 FT UNCOMMANDED FULL RT RUDDER TRIM. AUTO PILOT HAD BEEN ENGAGED FOR 2 MINUTES. COMPLIED WITH QRH DISCONNECTED AUTO PILOT & YAW DAMP. DISCOVERED RUDDER TRIM WAS AT FULL RT WITH NO INPUT FROM THE KNOB. KNOB WAS CENTERED. AT THIS TIME THE ACFT IS STILL PULLING HARD RT. ADJUSTED RUDDER TRIM TO CTR, ACFT CORRECTED & WAS HAND FLOWN BACK. LANDING & BRAKING WERE NORMAL. LANDED UNDERWEIGHT.