15.14 Flashcards
What are the system indicators used for
Monitor the operation of engine system e.g oil
What does EPR stand for
Engine pressure ratio
What are the unit for the level of engine vibration
From 0 to about 6
What does the EPR corresponds to
Engine thrust
Ho many engine vibration sensors are there on each engine and where are they located
There are 2, one in located in the compressor area and the other one is located in the turbine area
What are the two main type of oil pressure transmitter
The bourdon tube type
Strain Gauge type
What does EGT stand for
Engine gas temperature indication
What do fuel flow transmitter measure
The mass flow of fuel between fuel control unit and fuel nozzle
What are the performance indicators used fo?
Monitor the performance and the limit of the engine
What does EVMU stand for
Engine vibration monitoring unit
What can the maximum EGT indicators be
Between 600 and 900 degrees C
What does the fuel flow indicating system provide to the pilot
Actual fuel flow to the engines (kg or tones/hour)
Fuel used since engine start (kg or tons)
How do you calculate APU cal fuel quantity
Used fuel - fuel I tank at take off
What indication are used to monitor the correct operation of engine system
The secondary engine indicators
What can the engine indications be further divided into
Performance indications (primary)
System indicators (secondary )
Engine trend monitoring
What type of sensors re engine vibration sensors and what do they measure
They are accelerometer and they measure the radial acceleration of the rotor system
What are the three main parts of a rotor speed indicator
The sensor
The data transmission
The indication
What is engine trend monitoring
It is used on the ground to detect engine problems at an early stage
What does thermodynamic analysis check
The pressure and temperature along the gas flow path
What indicators can be used to give equivalent thrust values
> the rotational speed of fan {N1}
>engine pressure ratio
What three parts does a EPR indication system have
Two pressure pickups
A computer
The indicator
What can the the first sign of engine balance
Rotor imbalance
What are the three different analyses that the engine data carries out ?
> thermodynamics
< mechanic-dynamic
oil consumption
What does ACMS stand for
Aircraft Condition monitoring system
What does TIT stand for
Turbine inlet temperature
What does the mechanic dynamic analysis check
Any failure in the rotor system
