As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM PHX, EN ROUTE TO DFW, CREW REPORTED THE NR 1 ENGINE EXPERIENCED A SURGE AND ROLL BACK TO FLIGHT IDLE. FLIGHT RETURNED TO FIELD AT PHX AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE HIGH PRESSURE FUEL PUMP. ALSO, REMOVED AND REPLACED THE NR 1 ENGINE MEC. OPERATIONAL CHECK AND LEAK CHECK GOOD.