OIL SYSTEM D/O (3)OIL SYSTEM OPERATION (continued)SCAVENGE FLOWFrom the breather and the lubricated bearing locations (exceptintermediate gearbox), the oil is returned to the tank by seven scavengepump elements. The oil scavenge pump outlets connect together in acombined scavenge return flow to the scavenge filter through themaster magnetic chip detector. The scavenge filter cleans the oilreturning to the oil tank. As the oil goes into the tank it flows over adeaerator. The scavenge oil contains (pressurizing) air due to normalleakage across the bearing compartment seals. The deaerator separatesany air from the scavenge oil. The separated air is dischargedoverboard through the centrifugal breather driven by the gearbox.NOTE: Six magnetic chip detectors can be installed upstream of thepumps to sample return oil and detect any contamination(optional installation)