As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 126 - EN ROUTE PHL-LGW, CREW RECEIVED THE E/W 'ENGINE 2 EPR MODE FAULT' AND NOTED A TWO INCH THROTTLE SPLIT. FLIGHT RETURNED TO PHL AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE RIGHT ENGINE RELAY CONTROL UNIT. (M)