What was found
APPROXIMATELY 30 MINUTES INTO FLIGHT, CREW REPORTED AN ENGINE 1 EPR MODE FAULT. FLIGHT RETURNED TO FIELD AT PHX AND LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. FADEC 1A FLT DATA "EPRINI" P/F P5/EEC1. INSPECTED NR 1 EPR TUBES FOR VISIBLE DAMAGE. NONE NOTED. REMOVED AND REPLACED CLAMPS AT STACK AFT OF EEC, EPR LINES NO DAMAGE NOTED. AIDS CRZ RPT SHOWS P4.9 BOTH ENGINES MATCHED 13 MINUTES AFTER FAULT. REMOVED AND REPLACED NR 1 EEC PER AMM 73-22-34-400-010-A. OPS CHECK GOOD PER AMM 73-22-34-710-040-A. IDLE RUN GOOD. NO FAULTS.