What was found
AFTER TAKEOFF ON FLIGHT 3460, THE NR 4 ENGINE FLAME-OUT AND RETURNED TO FAR. AIR TURNBACK TO FAR. MAINTENANCE DETERMINED NR 4 ENGINE DIFFICULT TO ROTATE/SIEZED. REFERENCE FOLLOWING DISC/CA'S 14, 15, 16, 17, 18, 19 AND 20 FOR TROUBLESHOOTING. AC TO BE FERRIED TO MSP, TASK CARD THREE ENGINE FERRY. INSPECTED AC AND FOUND SAFE FOR FERRY FROM FAR TO MSP WITH NR 4 ENGINE INOP.