What was found
GUM - FLT 956 - DURING CLIMB PASSING 5,000 FEET, NR 3 ENGINE OIL QUANTITY DECREASING THROUGH 2.5 GALLONS, OIL PRESSURE AT 57 PSI, OIL TEMP 120 DEGREES CENTIGRADE. AT 1.6 GALLONS, AIRCRAFT SHUDDERED MODERATELY. NR 3 THROTTLE RETARDED TO CLOSED POSITION WHICH DECREASED VIBRATION. ENGINE FAILURE/FIRE CHECK LIST PERFORMED AND AIRCRAFT RETURNED BACK TO GUAM. ENGINE WINDMILL TIME APPROXIMATELY 12 MINUTES. (X)