As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM FAILED WHILE AT FL290. EMERGENCY DECLARED TO ALLOW DESCENT AT UNUSUAL AIRSPEED. PROBLEM CLEARED AT 8,000 FT, AIRCRAFT LANDED WITHOUT INCIDENT. FOUND MOISTURE IN ELEVATOR TRIM ACTUATORS. REPLACED ACTUATORS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 27-32-00, OPERATIONAL CHECK GOOD.