most modern gas turbine engines.

is a measurable film of oil between moving parts.

over pressure situation

a spring loaded adjustable valve

to accommodate oil expansion and foaming after passing through the bearing chamber

7 scavenge

gravity

prevents oil loss if cap isn’t installed

oil from air inside gearbox using centrifugal force.

to remove air from the oil

Spray jet, pressure, fed Splash oil and Metered oil Film Lubrication

squeeze film.

oil pressure spray nozzle

just before bearing chamber

cleaned only in engine overhaul

pressure sub-system or in scavenge sub-system.

a high power condition.

regulate the flow of oil through the heat exchanger

oil cooler in the pressure line, scavenge oil does not cooled before tank

wet and dry sump lubrication system

the engine property

typically not before 10-minutes after shut-down and not longer than 1 hour

blockage or cold starting

gear type pump

catch large debris that may have come from the bearings

siphon action down