What was found
ENROUTE, DIVERTED, CREW REPORTED, ENGINE NR 1 LOST OIL INFLIGHT. PERFORMED SHUTDOWN IAW QRH. AIRCRAFT LANDED UNEVENTFULLY. MAINTENANCE REMOVED AND REPLACED PRESSURE OIL CONTROL TUBE TO ENGINE GEARBOX, OPS AND LEAK CHECKED GOOD REFERENCE MM NR 71-00-01. AIRCRAFT RETURNED TO SERVICE.