As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - INFLIGHT, RIGHT ENGINE IN FLIGHT SHUT DOWN DUE TO OIL QUANTITY LOSS. RETURNED TO BOS AND LANDED WITHOUT INCIDENT. SINGLE ENGINE TIME 25 MINUTES. FOUND O-RING FOR OIL CAP TORN. FOUND DEBRIS UNDER OIL TANK CHECK VALVE. REMOVED DEBRIS AND REPLACED OIL CAP O-RING. REPLACED SCAVENGE AND PRESSURE FILTERS. SYSTEM GROUND CHECKED NORMAL OPERATION.