Engine monittoing and Ground Monitoring Flashcards
What’s the main reason for maintenance personal to operate a GTE
Confirming a flight crew reported fault
Where do u positon aircraft
Into wind , fit chocks and apply brakes
What do you inspect intakes and exhausts for
Fod , damage , freedom of rotation and exhausts are clear
Why must engines be ran on both wings
Prevent asymmetry problems
Why should you engine power not be increased above idle
Engine heating up and cooled down reduces service life
What is trimming
Pulling the throttle lever at idle speed and maximum thrust
How do we achieve accurate trim data
Operating ambient temperature and barometric pressure/airfield altitude is required
When are engine adjustments made
At idle rpm
Why is idle adjusted
Ensure that the engine idles at its lowest rpm authorised by manufacturer
Where are final trim adjustments made
In increase direction
On accretion checks what’s used as the datum
The oldest engine
After engine run how long do you run the engine in idle before closing hp valve
3 minutes
What is engine pressure ratio
Indication of thrust output
What does fuel fuel do
Monitor fuel consumption during flight
Why do we monitor EGT
Prevent the critical condition of overheat
What are expectations demands of EGT
When it exceeds red line
How do centrifugal compressor engines measure engine power
Comparing relationship between engine rpm and jet pipe pressure
Why can’t axial flow bypass engines use the same method as centrifugal compressor engines to interpret thrust
There is no direct relationship between engine rpm and thrust
How do axial bypass flow engines measure output
Comparison between static ambient pressure and exhaust gas pressure to indicate power output
What’s the torque monitoring system used to indicate
Power developed by a turboprop or turbo shaft engine
What is engine torque
Turning moment
What is engine torque proportional to
Horsepower and is transmitted through propeller reduction gear or power output shaft
What’s the most common type of sensing systems
Hydro-mechanical and electronic
How is torque displayed in the cockpit
Torque oil pressure
Torque percentage
Direct horse power read out
