As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE TORQUE FLUCTUATED BETWEEN 10-60 PERCENT. NO ELECTRONIC ENGINE CONTROL (EEC) FAULT. PROP RPM DROPPED TO ABOUT 71 PERCENT MOMENTARILY. AIRCRAFT RETURNED TO MIAMI AND DECLARED EMERGENCY LANDING. GENERAL INSPECTION OF TORQUE SENSORS CONDUCTED AND NO DISCREPANCY FOUND. ALSO, INSPECTED TORQUE SENSOR WIRING AND FOUND SATISFACTORY. AIRCRAFT RELEASED FOR A FUNCTIONAL CHECK FLIGHT AND PASSED WITHOUT FURTHER PROBLEM. (M)