This check is used to examine the engine components or system for leakage when the engine operates at the idle-power position.

The horizontal airfoil of the tail/ nose section to which the elevator/ canard is attached includes items such as spars, ribs, stringers, plates/skin, access covers, tips, etc.

The horizontal and vertical stabilizers include the structure of the elevator and rudder.

Storage is that portion of the system used for storage of oil. It includes items such as tanks, filling systems, internal hoppers, baffles, tank sump and drain, etc.

Noise suppressor includes items such as pipes, baffles, shields, actuators, plumbing, linkages, position indicators, warning systems, etc.

Oil are those units and components external to the engine concerned with storing and delivering lubricating oil to and from the engine.

Oil distribution is that portion of the system which is used to conduct oil from and to the engine.

For turbine engines, exhaust includes units external to the basic engine.

Thrust reverser is used to change the direction of the exhaust gases for reverse thrust.

Noise suppressor is that portion of the system which reduces the noise generated by the exhaust gases.

Exhaust are those units and components which direct the engine exhaust gases overboard.