What was found
LAX INFLIGHT T/217/19 OIL QUANTITY DECREASED IN FLIGHT TO 11 QUARTS. RECOVERED UPON LANDING. REPLACED NUMBER 1 ENGINE PRESSURIZATION AND PRESSURE RELIEF VALVES ON NR 1 ENGINE OIL TANK. SYSTEM GROUND CHECKED NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LAX INFLIGHT T/217/19 OIL QUANTITY DECREASED IN FLIGHT TO 11 QUARTS. RECOVERED UPON LANDING. REPLACED NUMBER 1 ENGINE PRESSURIZATION AND PRESSURE RELIEF VALVES ON NR 1 ENGINE OIL TANK. SYSTEM GROUND CHECKED NORMAL OPERATION.