As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/PHL - FLT 6455 - DURING CRUISE AT 0650 HRS ON 7-17-95, RETURNED TO IAD DUE TO THE OIL PRESSURE ON THE LEFT ENGINE BEING ERRATIC. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE LT OIL PRESSURE TRANSDUCER. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)