Engine oil pressure indicating system -- device that gives continuous readings of engine oil pump
pressure in psi.
Engine oil temperature indicating system -- device electrically connected to the 28v dc system which
transmits temperature readings to the indicator in degrees centrigrade.
Engine speed notation -- capital letter N represents the rotational speed of the engine. When a number is
placed after the N, as in N1, it indicates a specific system on the engine.
Engine stations -- specific locations on the engine designating temperature- or pressure-measuring
locations. For example, T3 means the third temperature pickup on the engine.
Engine surge -- result of compressor stall. The complete engine in stall.
Exhaust -- hot gases discharged from the engine through the exhaust diffuser section.
Exhaust diffuser -- section composed of an inner and outer housing, separated by hollow struts across
the exhaust passage. It forms a divergent flow path for the exhaust gases.
Exhaust gas temperature indicator -- sensitive millivoltmeter calibrated in degree centigrade, activated
by an electrical force generated by its thermocouple.
Fir tree mount -- manner of attaching the blades to the disk in the turbine rotor assembly. The root of
the blade where it is attached to the disk is shaped like a fir tree. See figures 1.27 and 1.28 on
page 42.
Foreign object damage -- commonly called FOD, harm or destruction to the turbine engine caused by
foreign objects sucked into the inlet area of the engine with the required air.
Forged -- shaped by hammering. Only the malleable metals are worked successfully. The application of
heat increases plasticity.
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