Engine oil system

Question 1

describe the engine oil system

Answer 1

self contained pressurized recirculating dry sump system

Question 2

components of the engine oil system

Answer 2

oil tank
oil supply/scavenge system
oil filter and condition monitoring system
air/oil cooler (scroll vanes)
fuel/oil cooler
chip detector
pressure and temp indicators

Question 3

path of oil

Answer 3

sucked from tank through eng oil pump then through the filter then AGB and 6 main sump bearings, scavenge pump inlet, chip detector, fuel/oil cooler, main frame, scroll vanes then back to the oil tank

Question 4

does the oil filter PDI trigger the bypass caution

Answer 4

no, it indicates bypass will happen soon, there is a separate switch in the valve

Question 5

thermal lockout on oil filter bypass

Answer 5

38 deg celsius so it doesn’t pop during cold weather starts

Question 6

does the oil only flow through the scroll vanes upon activation of the anti ice system?

Answer 6

no constantly providing anti ice

Question 7

where are the eng oil temp and px sensors

Answer 7

FWD face of AGB after filter in routing

Question 8

what indications come from eng oil temp and px sensors

Answer 8

vertical displays and oil press hi/low cautions and most likely the oil hot but NATOPS doesn’t directly say