Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
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Description
TASK 77-21-15-990-401 EGT Thermocouple - Related Parts - Description And Operation Of The EGT Thermocouple
Description
The EGT thermocouple is a component of the engine, mounted on the Turbine Exhaust Case. It measures the exhaust gas temperature at this position. The unit consists of the two independent type K outputs, each output being the average of three elements at three different immersion depths. Electrical connections to the thermocouple probe are made by means of four terminal studs: two studs are of nickel chromium and two are of nickel aluminum Refer to
Operation
The thermocouple converts heat energy from the engine exhaust gases into electrical signals which are used to indicate and control the engine exhaust gas temperature.
When the junctions of the elements are heated, the millivolt output will be proportional to the average temperature of the junctions.
Figure: Exhaust gas temperature thermocouple
Exhaust gas temperature thermocouple
