As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5409 - BOS-BGR - AFTER TAKEOFF, CAPTAIN NOTED THE NR 1 ENGINE OIL PSI WAS DECREASING. THE CAPTAIN SHUT DOWN THE NR 1 ENGINE AS A PRECAUTIONARY MEASURE. CREW DECLARED AN EMERGENCY AND THE AIRCRAFT RETURNED TO THE FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE OIL TRANSFER TUBE ELBOW. AIRCRAFT WAS RETURNED TO SERVICE. (M)