11.5.2 Specific Flashcards
What 3 communication systems can modern aircraft be divided into?
. Aircraft communications
. Radio communications
. Accident investigations
What is the purpose of static discharge?
Continuously discharge static electricity to prevent build up of high voltages on fuselage
How many VHF and HF systems does the aircraft have?
3 VHF
2 HF
What does the flight interphone system do?
Communicates between the cockpit and crew members
What is purpose of passenger address system?
Gives information to passengers
What is the priority of the PA?
. Cockpit
. Cabin crew
. Pre recorded
. Boarding music
What does a high chime attention getter mean?
Sounds when a passenger calls the cabin crew
What does a high- low chime attention getter mean?
When one crew wants another crew
What does a low chime attention getter mean?
Fasten seat belts and no smoking signs
What does CVR stand for and why do we have one?
Cockpit voice recorder
Helps in accident investigations
What are the two different voice recorders?
. Analogue tape recorder
. Digital solid state recorder
How many separate in our channels does the CVR have?
4
What is the VHF communication system used for?
For short distance voice and data communication with ground station or other aircraft’s
What’s the HF communication system used to?
Long distance communication
What’s the VHF frequency?
118 to 136.975mHZ
What do modern aircraft rely on for long distance communications?
SATCOM system
How many independent HF systems are on a long range aircraft?
2
What are the 3 components of a HF system?
. Transceiver
. Antenna
. Antenna coupler
Where is the transceiver located?
In avionics compartment
Where is the antenna located?
In the leading edge of vertical stabiliser
Where is the antenna couple installed?
Near the antenna
What does ACARS do?
Data link communication system
Transfers messages and data between aircraft and ground
Who starts manual reports?
Pilots, airline ground staff and ATC
What does SATCOM provide?
Reliable worldwide digital data transfer
What is SATCOMS 3 main components?
. Satelliates
. Aircraft earth stations
. Ground earth stations
Why are emergency locator transmitters installed?
To help search and rescue find a crashed aircraft
What 3 international emergency frequency’s are there? And which one is main?
. 12.1.5mHZ - main
. 243mHZ
. 406mHZ
What 3 systems does a radio nav system have?
. ADF
. VOR
. ILS
What is the function of ADF system?
Uses radio signals from ground stations to calculate the direction to the station
How does VOR work?
The VOR receiver calculates the magnetic bearing from two signals transmitted by a ground station
The VOR ground station transmits how many signals?
2
What does ADF stand for?
Automatic direction finder
VOR outputs are provided to what?
. Auto pilot
. Flight director
. FMS - flight mangment systems
What does the glide slope ground station do?
Transmits 2 lobes to give a descent path to the touchdown point on runway
What is purpose of ILS?
Provides lateral and vertical position data to line the aircraft up on approach to runway
For CAT 1 what are the requirements?
800m of runway visibility at 200m of height
What are the requirements for CAT 2?
400m of runways visibility of height of 100m
What are the requirements for cat 3?
Less than 200m of visibility at height below 100m
At what feet does the radio altimeter work at?
Below 2500ft
What is function of radio altimeter?
Measure the vertical distance between the aircraft and ground
What is purpose of ground proximity warning system GOWSP?
Warn flight crew when aircraft is too close too ground
Auto set to less than 2500ft
How does DME system measure the distance to the ground station?
Transmits a signal to the ground station called interrogation and by counting the time it takes to revive and reply signal
What does the weather radar presents?
A map type display of weather conditions in front of aircraft
180 degree sweep
What are the three identification codes?
7500
7600
7700
What is the ident code for emergency?
7700
What is ident code for hijacking?
7500
What is ident code for radio faliure?
7600
What does TCAS stand for?
Traffic alert and collision avoidance system
What is the purpose of TCAS?
Protects the airspace around TCAS equipped aircraft’s
What are the 2 TCAS alerts?
. Traffic advisor (traffic traffic)
. Resolution advisory - corrective and preventative actions
What do Gyros measure?
The rotation around the 3 axes: pitch roll and heading(yaw)
What do accelerometers measure?
The movements along aircraft axes = x and y accelerations
What is purpose of autopilot?
Reduces the pilots workload by controlling the flight automatically as well as landing in poor weather
What system dampens the Dutch roll oscillations?
The yaw damper
On older aircraft the autopilot controls are found on pedestal. Where is it found on modern aircraft?
On glare shield
What is the important job of inner loop?
Controls the attitude of aircraft and is always active
What does the outer loop do?
Controls aircraft automatically to capture and stabilise flight path
What is purpose of servomotor?
Move the elevator directly or uses mechanical in out of hydraulic power unit
What does the flight director do?
Shows the pilot how to fly the aircraft manually
What is the function of auto throttle system?
Automatically control thrust if the engine to required value
What is pitch trim system used for?
Maintain longitudinal stability without permanent elevator deflections
What method is used to disconnect the auto throttle system?
Push auto throttle quick disconnect push button
What does the auto pilot disengage warning consist of?
Red flashing light of PFD
sometimes an aural
