M15.14 Flashcards
3 groups of engine indications?
Performance indications (primary indications)
System indications (secondary indications)
Engine trend monitoring
Can engine trend monitoring be seen in the cockpit?
No
What do performance indications show?
The performance and limits of the engine and set thrust for different phases of flight
What do system indications show?
Monitors engine systems and detect malfunctions
What 2 indications are used to give thrust?
Rotational speed of fan
Engine pressure ratio
What are the 3 things monitored by the system indication system?
Oil quantity
Oil pressure
Oil temp
What are the warnings found on ECAM/EICAS?
Engine exceeding limits
Low oil pressure
Clogged filter
Unlocked thrust reverser
ACMS?
A/C condition monitoring system
What are the 3 analyses done by the ACMS?
Thermo dynamics
Mechanical dynamic
Oil consumption
Where is engine trend monitoring done?
In a workshop
How many rotor speed indications are there in a engine?
One for each rotor system
Engine speed indications are always shown as what?
Percentage of 100%
What are the 3 parts of the rotor speed indication?
Sensor
Data transmission
Indication
EPR?
Engine Pressure Ratio
EPR corresponds to what?
Engine thrust
TIT?
Turbine Inlet Temp
ITT?
Inlet Turbine Temp
The temp read by the EGT must not exceed what?
900c
3 different types of EGT indications?
Clock type
Moving verticals bar
Electromechanical indicator
How does the hydraulic indication system work?
On the output shaft of an epicyclidal reduction gearbox
What’s the purpose of helical cut teeth in a planet gear?
Allows them to transmit in a increasing axial thrust
What does the electronic torque meter use?
2 concentric shafts between the engine and gearbox
What is the engine pressure ratio indicator used for?
To set the thrust for takeoff
What is vibration a sign of?
Rotor damage or rotor imbalances
Vibration is shown in the cockpit by what?
Units from 0 to 6
EVMU?
Engine Vibration Monitoring Unit
How do vibration sensors work?
By delivering an electrical signal to a computer
What type of sensor is a vibration sensor?
Accelerometer
How many vibration sensors are there on each engine?
2
Where are the vibration sensors located on the engine?
In the compressor area
In the turbine area
Fuel flow to the engines is shown in what?
Kg per hour
Fuel used since engine was started is shown in what?
Kg per hour
What does fuel flow indication allow you to do?
To monitor the performance and economic operation of the engines
When does the fuel used indication automatically reset?
When master switch is switched to on and a/c on ground
What calculates fuel?
FADEC
What does the fuel flow transmitter measure?
Mass of fuel flow between fuel control unit and fuel nozzles
How does the fuel flow transmitter work?
By the fuel mass turning a turbine against a spring and the deflection angle is measured
Do modern fuel flow transmitters need a electric motor?
No
What are the 2 type of oil quantity transmitters?
Capacitance type
Reed switch type
The oil pressure transmitter is connected to what?
Oil supply line and oil tank vent line
How does the oil pressure transmitter work?
By sense the pressure difference between the total oil pressure in supply line and vent pressure in the tank
What are the 2 types of oil pressure transmitters?
Bourdon tube type
Strain gauge type
What does the low oil pressure switch do?
Initiates a low oil pressure warning
The oil pressure warning is always accompanied with what?
An acoustic warning
Where is the oil temp sensor located?
In the scavenge system
What is used to find internal wear of lubricated engine components?
SOAP
