As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FLIGHT LEVEL 220, THE RIGHT POWER LEVER FROZE IN POSITION AT 84 PERCENT TORQUE. THE CREW DECENDED TO FLIGHT LEVEL 110. CONTROL WAS REGAINED AND THE AIRCRAFT WAS LANDED IN LAN WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED, CLEANED AND LUBED THE ENGINE CONTROLS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 76-11-32. FUNCTION CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.