What was found
EICAS MESSAGE AND LOW OIL PRESSURE LIGHT ON NR 1 ENGINE. ENGINE SHUT DOWN IN FLIGHT, AIR TURNBACK. OPENED COWLING AND C-DUCTS, FOUND SCAVENGE LINE LOOSE. RETIGHTENED AND SAFETIED. CHECKED MAGNETIC CHIP DETECTORS REF MM 79-21-03. CHECKED SCAVENGE AND PRESSURE FILTERS REF MM 79-32-00. NO DEFECTS NOTED. SERVICED OIL, ACCOMPLISHED ENGINE RUNS. NO LEAKS NOTED, CLOSED COWLS AND C-DUCTS.