What was found
AIR RETURNED BACK TO DEPARTURE DUE TO ENGINE 1 EPR MODE FAULTED DURING CLIMB. CREW REVEALED THAT AT THROTTLE BACK AT TOP OF CLIMB NR 1 ENGINE THRUST LOCKED AND EPR MODE FAULT APPEARED. NO FURTHER FAULTS FOR THE REST OF THE FLIGHT WITH N1 MATCHED HALF KNOB SPLIT WITH ALL REMAINING PARAMETERS MATCHED. R & R FMU IAW AMM 73-22-52-400-010-B FOR TROUBLESHOOTING PURPOSES. R & R FUEL PUMP FOR TROUBLESHOOTING PURPOSES. POWERPLANT ENGINEERING SUSPECTED T2/P2 ON NR 1 ENGINE WAS RECENTLY REPLACED WITH A ROUGE UNIT. R & R T2/P2 SENSOR, TOTAL PRESSURE PROBE, IAW AMM 73-22-11-000. OPS CHECKED GOOD.