What was found
PILOTS REPORTED PRECAUTIONARY SHUTDOWN OF NR 1 ENGINE AFTER ERRATIC FUEL FLOW AND TORQUE INDICATIONS ON DESCENT, NO CAUTION LIGHTS ILLUMINATED. MX REPLACED NR 1 ENGINE PCU, O/S GOVERNOR AND PROPELLER HIGH PRESSURE PUMP FOR FERRY FLIGHT TO MX BASE. FDR DATA DOWNLOADED AND FORWARDED TO ENGINE AND PROPELLER MANUFACTURERS FOR ANALYSIS OF OVER TORQUE EVENT AND DETERMINED TO BE THE RESULT OF A FUEL FLOW ISSUE. ALL INSPECTIONS OF ENGINE AND PROPELLER PER MANUFACTURER COMPLETED WITH NO FAULT FOUND, REPLACED NR 1 ENGINE HMU, TSCU AND ECU, ALL OPERATIONAL CHECKS SATISFACTORY. AIRCRAFT RETURNED TO SERVICE. THE REMOVED HMU, TSCU AND ECU SENT OUT FOR EVALUATION, AWAITING RESULTS.