What was found
DURING FLIGHT FROM COS PILOT NOTICED ENGINE OIL LEVEL GETTING LOW. OIL LEVEL CONTINUED TO DECREASE AND LOW LEVEL LIGHT STARTED TO ILLUMINATE. PILOT DECIDED TO SHUTDOWN NR 1 ENGINE 15 MINUTES OUT OF LAS. PILOT DECLARED EMERGENCY, AND LANDED SAFELY AT LAS. PEFORMED TESTS AND INSPECTION IAW PWA MM 72-00, EXCESSIVE OIL CONSUMPTION. INSPECT OIL PUMP AND SCAVENGE PUMP. CHECKED MAIN OIL SCREEN, ALL OK. PERFORMED BREATHER PRESS CHECK PER PWA MM 72-00, WITHIN LIMITS. NO EXTERNAL LEAKS FOUND. REMOVED AND REPLACED WITH SERVICEABLE ENGINE.(M)