Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task H. Aircraft Instrument Systems

AM.II.H.K5

Knowledge

Temperature indicating instruments.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Airframe p. 10-38
Chapter 10: Aircraft Systems › Temperature Measuring Instruments › Thermocouple Temperature Indicators
thermocouple circuit is inside the instrument case. Since the electromotive force set up in the circuit varies with the difference in temperature between the hot and cold junctions, it is necessary to compensate the indicator mechanism for changes in flight ... same as the bimetallic thermometer described previously. When the leads are disconnected from the indicator, the temperature of the flight deck area around the instrument panel can be read on the indicator dial. [Figure 10-73] Numeric LED indictors…
Aviation Maintenance Technician Handbook - Airframe p. 10-34
Chapter 10: Aircraft Systems › Temperature Measuring Instruments › Non-Electric Temperature Indicators
Temperature Measuring Instruments The temperature of numerous items must be known for an aircraft to be operated properly. Engine oil, carburetor mixture, inlet air, free air, engine cylinder heads, heater ducts, and exhaust gas temperature ... turbine engines are all items requiring temperature monitoring. Many other temperatures must also be known. Different types of thermometers are used to collect and present temperature information. Non-Electric Temperature Indicators The physical characteristics of most materials change when exposed…