As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE ALTITUDE OF FL220 THE RIGHT CONDITION LEVER BECAME STIFF AND WOULD NOT MOVE IN EITHER DIRECTION. THE CREW RETURNED TO PIT AND MAINTENANCE REPLACED THE RIGHT CONDITIONER LEVER TELEFLEX IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 76-11-00 THE RIGHT CONDITION LEVER CHECKED GOOD.