What was found
INSPECTION TYPE:N/A, ON CLIMBOUT NR 4 ENGINE OIL PRESSURE BEGAN TO FLUCTUATE BETWEEN 35 AND 45 PSI. ENGINE OIL PRESSURE 4 LIGHT ILLUMINATED TO CONFIRM, AT 0715Z , NR 4 ENGINE SHUT DOWN WHEN OIL PRESS BELOW RED ARE CONTINUOUSLY AND OIL PRESS LIGHT ON STEADY, WINDMILLING OIL PRESS. FOUND NR 4 ENGINE OIL TANK CAP MISSING. INSTALLED NEW OIL CAP AND INSPECTED MAIN OIL FILTER AND MAG PLUGS, FOUND NON DEFECT AND ENGINE WINDMILLING. INSPECTION C/W PER MM 72-00-00, PG 699.1 AND ENGINE RUN IDLE, CHECK OK PER 71-00-00.