What was found
ON CLIMBOUT OF SNA NR1 ENGINE EXPERIENCED A SIGNIFICANT OIL QUANTITY DROP. RETARDED THE THROTTLES TO IDLE. ONCE AT IDLE THE NR 1 ENGINE OIL PRESSURE CONTINUED TO DECREASE. OIL PRESSURE DECREASED FROM 13 PSI TO 6 PSI OVER 2 MINUTES 35 SECONDS AT WHICH TIME ACCOMPLISHED ENGINE SHUTDOWN FOR OIL PRESSURE IN RED ZONE. AIRCRAFT DIVERTED INTO LAX WHERE UNEVENTFUL LANDING OCCURRED. UPON OPENING COWLING DISCOVERED EVIDENCE OF AN EXCESSIVE OIL LEAK COULD NOT PINPOINT ORIGIN. ACCOMPLISHED EA 700 71EA 05563 NR 1 ENGINE SHUTDOWN INITIAL EVALUATION UPON REMOVAL OF FILTER & CHIP DETECTORS FOUND OILY SLUDGE ON FILTER SCREEN. FOUND OIL TO BE DARK SLUDGY AND BURNT APPEARANCE. REPLACED NR 1 ENGINE.