What was found
IN CRUISE, NR 1 ENGINE LOST 2 QTS OF OIL EVERY 10 MINUTES. THE NR 1 ENGINE WAS SHUTDOWN AS A PRECAUTION. AN EMERGENCY WAS DECLARED, THE AIRCRAFT DIVERTED TO AND LANDED WITHOUT INCIDENT. FOUND INLET PRESSURE LINE LEAKING. TIGHTENED LINE, OPS AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. OIL QUANTITY DROPPED SIGNIFICANTLY AFTER TAKE OFF. THE NR 1 ENGINE WAS SHUT DOWN AS A PRECAUTION. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. FOUND THE NR 1 ENGINE FUEL PUMP SHAFT O-RING MISSING. INSTALLED O-RING. OPS AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.