As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT NR 63 - CREW NOTICED FLUCTUATION IN NR 1 ENGINE DURING CLIMB-OUT OF PHL. FUEL FLOW/EPR AND N1 FLUCTUATIONS WERE NOTED ALONG WITH A SLIGHT OIL PRESSURE FLUCTUATION. CREW RETURNED TO PHL WITH NR 1 ENGINE AT IDLE. MAINTENANCE REPLACED FUEL PUMP AND FUEL CONTROL UNIT PER M/M 73-21-2. RAN ENGINE AND LEAK CHECKS GOOD. (M)