What was found
NR 1 ENGINE EPR DROPPED OFF ON CLIMB OUT OF 7,000 FEET. NR 1 ENGINE EPR WAS 1.73 AND NR 2 ENGINE EPR WAS 1.85. BOTH THE NR 1 AND NR 2 ENGINES NR 1 WAS 89 PERCENT AND NR 2 WAS 92 PERCENT. THE AIRCRAFT RETURNED AND LANDED IN HNL WITH NO FURTHER INCIDENT. (ETOPS A/C OR NON ETOPS FLIGHT) MAINTENANCE INSPECTED THE NR 1 ENGINE AND PURGED THE PT2 AND PT7 LINES. THE NR 1 ENGINE EPR TRANSMITTER WAS REPLACED IAW MM. A HIGH POWER RUN AND POWER ASSURANCE CHECK WAS COMPLETED ON THE NR 1 ENGINE. NO DISCREPANCIES WERE NOTED AND THE AIRCRAFT RETURNED TO SERVICE.