15.14 engine indication system Flashcards
what are inserted at the turbine discharge, where the temperature provides a relative indication of the temperature at the inlet
temperature thermocouples
what does the EGT indicator in the flight deck show
the average temperature measured by the individual thermocouple
what are several thermocouples used to measure
EGT and TIT
what illuminates when the TIT reaches a predetermined limit.
An over temperature warning light
the engine indications can be divided into three groups what are they
performance indications
system indications
engine trend monitoring
there are two different indications which give an equivalent value, This is either
The rotational speed of the fan, called N1
The Engine Pressure Ratio (EPR)
what are the secondary engine indications used to monitor
the correct operation of engine system
what is used to prevent larger performance reductions or even engine problems during flight
engine trend monitoring
what are the three different analyses that are usually done
thermodynamic analysis
mechanical dynamic analysis
oil consumption analysis
what does the engine pressure ratio indication compare
the engine turbine discharge pressure to the pressure of the ram air at the inlet of the engine
what are the two main types of oil pressure transmitters
the bourdon tube type
the strain gauge type
what is used in the engine oil system to initiate a low oil pressure warning
an additional pressure switch
what is used to indicate the temperature of the oil as it enters the oil pressure pump
an oil inlet temperature indicator
what are the most common type of oil temperature sensor used in aircraft engines
Resistance Temperature Detector (RTD) or Thermocouple
what sensors give warnings of an impending filter blockage and the risk of cavitation
a differential pressure sensor
why is monitoring the fuel temperature critical
it informs the flight crew when the temperature is causing ice to form in the fuel system and the fuel filter
The fuel flow indicating system provides two different indications for the flight crew, what are they
The actual fuel flow to the engines
The fuel used since the engine was started
what are the two types of fuel flow transmitter
synchronous mass flow
motorless mass flow
Each rotor speed indication has three main parts, what are they
The sensor
The data transmission
The indication
what are the two different types of sensors, which can measure rotor speed on engines
variable reluctance type sensor
tachometer generator
There are three different types of rotor speed indication, what are they
A display with a clock-type scale
A display with a moving vertical bar
The classical electromechanical indicator
The engine vibration sensors are accelerometers that measure what
the radial acceleration of the rotor system.
There are generally two different types of accelerometers used on engines, what are they
The electromagnetic accelerometer
The piezoelectric-crystal type sensor
what are the two types of torque meters
electrical torque meter
hydraulic torque meter
