Inspect Lubrications Systems Flashcards
What two instruments show the condition of a reciprocating-engine lubrication systems?
Oil pressure and oil temperature gages
What must be done to an oil filter when it is removed from the engine?
It should be cut open and the pleated element examined to determine the type and amount of contaminant carried by the oil
What is the purpose of an air-oil separator or deaerator in a turbine engine oil tank?
In normal operation the oil picks up a quantity of air and it is swirled as it enters the separator.
What type of oil quantity indicator is used in most aircraft engines?
A dipstick that measures the quantity of oil in the tank or sump
When should the engine oil quantity be checked on a turbine engine?
As soon as practical after the engine is shut down
Where is the oil temperature measured on a reciprocating engine?
Usually at the oil pressure screen before the oil goes into the engine passages
How is oil pressure regulated in an aircraft engine?
A pressure-relief valve senses the desired pressure and sends all of the oil that caused excessive pressure back into the engine sump
Why do engine manufacturers recommend that engine lubricating oil be changed at specific intervals?
The oil picks up contaminates and carries them through the engine where they can cause wear. The oil also becomes acidic
What is the purpose of the restricted orifice in the line between the oil pressure gage and the engine?
The restricted fitting helps dampen any pulsations in the oil pressure caused by the pump
What is a hot-tank lubrication system for a tubrojet engine?
A lubrication system in which the oil cooler is in the pressure subsystem and the scavenged oil is not cooled before it is returned to the tank
What is a cold-tank lubrication system for a tubrojet engine?
A lubrication system in which the oil cooler is in the scavenge subsystem and the scavenged oil is cooled before it is returned to the tank
