11.5 Avionic Systems Flashcards
What is the level of an advisory IAW instrument systems?
Level C/ 1
What frequency is the right lobe IAW avionics systems
150Hz
What frequency is the upper lobe IAW avionics systems
90Hz
What does mode S on the transponder do?
The transponder can be activated selectively, can transmit address and identification
What does mode A on a transponder do?
Can only transmit the identification codes
What gyro would be used to indicate the aircraft’s attitude
Vertical gyro
Modern flight recorders…
Store flight data from the last 25 hours of flight for accident investigation purposes
Vertical gyros have…
3 degrees of freedom with a vertical spin axis
What does the inner loop of the an auto pilot control
Controls the attitude of the AC and is always active
What signal is used to dampen Dutch roll oscillations
Yaw rate
What method is used to disconnect the auto throttle system
Pushing either throttle level disconnect button
What is the VHF emergency frequency
121.5Mhz
What is true for ACARS
Used for manual and automatic data transfers between the AC and the ground in both directions
What does 1KhZ tone indicate on HF system
Indicates that the antenna coupler is tuning to the newly selected frequency
What is the priority sequence in the passenger address (Pa) amplifier?
Cockpit crew
Cabin crew
Pre recorded announcements
Boarding music
How does DME measure distance
The time between the interrogation and reply signal is proportional to the distance of the station
Describe VOR principle..
The VOR receiver calculates the magnetic bearing from two signals transmitted by a ground station
What is the purpose of two antennas fitted in an ADF system
Two antenna systems are required to determine the correct direction
What indicates localiser deviation
HSI (horizontal situation indicator)
ADI (attitude direction indicator)
What does the airspeed indicator indicate?
It shows the indicated airspeed (IAS) which is the reference for all aerodynamic parameters like lift and drag
What is the priority sequence for PA?
. Cockpit crew
. Cabin crew
. Pre recorded
. Boarding music
What happens to the horizontal stabiliser if the centre of gravity moves forwards?
The elevators would move up and trim tab move down
