Book 3 - Oil System Components Flashcards
the oil tank is normally mounted on the engine, it may be a separate unit or part of an external _______. sight _____ or dip _____ to allow the contents to be checked. can be replenished through gravity or ________ filling. to assist in removing from air from oil, the return oil passes through a de-aerator in the top of the tank
the oil tank is normally mounted on the engine, it may be a separate unit or part of an external GEARBOX. sight GLASS or dip STICK to allow the contents to be checked. can be replenished through gravity or PRESSURE filling. to assist in removing from air from oil, the return oil passes through a de-aerator in the top of the tank
the pressure filter consists of one or more ____-wound elements. scavenge strainers are usually of wire-____ construction. can be wire-mesh backed with _____. oil filters are cleaned and the debris _________ to see if there is a mechanical break-down within the engine
immediately before the bearings, there are normally last-______ filters (LCF’s). these are designed to catch debris that gets through the main filter. they can be thread type or fine gauze mesh
the pressure filter consists of one or more WIRE-wound elements. scavenge strainers are usually of wire-MESH construction. can be wire-mesh backed with RESIN. oil filters are cleaned and the debris ANALYSED to see if there is a mechanical break-down within the engine
immediately before the bearings, there are normally last-CHANCE filters (LCF’s). these are designed to catch debris that gets through the main filter. they can be thread type or fine gauze mesh
MCD’s give early warning of _______ failure.
they are of bayonet type fittings and can be removed quickly, without ___ loss
some MCD’s give an electrical __________ in the flight deck. the low resistance across the detector which gives the indication can be caused by insignificant carbon or metal deposits. a ____ burner is fitted which passes an electrical charge through the MCD to clear off any fine debris, leaving only major particles. if the warning light remains __ then the pilot knows the debris is of a more serious nature
MCD’s give early warning of BEARING failure.
they are of bayonet type fittings and can be removed quickly, without OIL loss
some MCD’s give an electrical INDICATION in the flight deck. the low resistance across the detector which gives the indication can be caused by insignificant carbon or metal deposits. a FUZZ burner is fitted which passes an electrical charge through the MCD to clear off any fine debris, leaving only major particles. if the warning light remains ON then the pilot knows the debris is of a more serious nature
the oil pump assembly consists of ____ gear type pressure and scavenge pumps, usually fitted to a common shaft, driven from an engine gear train
the oil pump assembly consists of SPUR gear type pressure and scavenge pumps, usually fitted to a common shaft, driven from an engine gear train
the relief and by-pass valves are nearly always _____-loaded plate valves with no form of ________ adjustment
the relief and by-pass valves are nearly always SPRING-loaded plate valves with no form of PRESSURE adjustment
oil flow into oil coolers is controlled by a ______statically controlled by-pass valve because it is pointless to cool air that is already ____
the cooling medium can either be air or fuel
on some air cooled coolers, the air flow through the cooler can be controlled by a flap-valve which is automatically operated by the oil __________
oil flow through the cooler is uninterrupted unless the cooler becomes blocked, when a ___________ by-pss valve opens to allow it to go around the cooler
oil flow into oil coolers is controlled by a THERMOstatically controlled by-pass valve because it is pointless to cool air that is already COLD
the cooling medium can either be air or fuel
on some air cooled coolers, the air flow through the cooler can be controlled by a flap-valve which is automatically operated by the oil TEMPERATURE
oil flow through the cooler is uninterrupted unless the cooler becomes blocked, when a DIFFERENTIAL by-pss valve opens to allow it to go around the cooler
the breather system consists of the de-aerator and the centrifugal breather
the rotating vanes of the breather ___________ the oil from the mist and the air is ________ overboard through the hollow drive shaft
the breather system consists of the de-aerator and the centrifugal breather
the rotating vanes of the breather CENTRIFUGE the oil from the mist and the air is VENTED overboard through the hollow drive shaft
