34 Navigation Flashcards
The static ports are routed and connected to what?
Rate of climb indicator, altimeter, airspeed indicator.
What should be done to the static system after it rains?
Drain the static system.
Impact pressure entering the pitot tube system is directed where?
Dual airspeed indicators by seperate tubing.
How does the pitot system drain?
The pitot tubes are the lowest point of the system so they naturally drain.
If you get erratic readings on the instruments or are concerned of a blockage what other means do you have for pitot static?
An alternate air source which is taken from the interior of the aft fuselage.
When are inspections required on the air data systems
Every 24 months or anytime removal of a static port has occurred or if damage to the RVSM area is observed.
How should inspections of the air data systems be carried out?
At ambient temperatures with aircraft weight on wheels.
What should be check on the air data system and transponder?
Accurate reading of the displayed altitude.
How large is the RVSM region on the aircraft?
Approx 24 x 24 inches surrounding the static ports.
How must repairs be carried out in the RVSM region?
All repairs must be carried out internally of the structure.
What does the air data system consist of?
2 x ADC-3000 Systems
What inputs are there for the ADC-3000
Pitot & Static pneumatic inputs, air temperature and inputs from the integrated avionics processor IAPS.
Where does the ADC-3000 send its information?
Attitude heading computers AHC, Integrated avionics processors IAPS, PFD’s and MFD’s.
What does the Attitude Heading System consist of?
2x AHC-3000’s (Attitude Heading Computers), 2x FDU-3000 Flux Detector Units & 2x ECU-3000 External Compensation Units.
What is the function of the 2 flux detector units?
Provide accurate magnetic flux measurements to the AHC for use in computing accurate airplane heading.
What are the 2 modes of heading function?
Magnetic slaved mode & Directional gyro mode.
Explain the slaved mode.
Heading computations slaved to the flux detector units, primary heading mode in normal ops.
Explain the DG mode.
FDU is not used to slave. AHC performs like a directional gyro.
What are the slew push buttons used for?
Used to periodically correct drift, right or left.
What is the purpose of the external compensation units ECU’s?
Provide electrical compensation for any flux detector errors caused by the airplane altering the earths magnetic field.
What does the Electronic standby instrument system used for? ESIS GH-3100
Provides a visual display of attitude and slip/skid information computer from its internal 3 axis inertial sensor.
Where does the ESIS get its air data information from?
Pitot static system inputs.
If the ESIS system is removed from the aircraft what is left behind?
DCM-3100 config module is left behind attached by a chain to the wiring harness.
What is the function of the Magnetometer MAG 3000A and where is it installed?
It is a 3 axis magnetic sensor that senses magnetic fields and then send this information in a digital format to the ESIS. it is located in the tail cone.
How is the ESIS powered and what happens in the event of power loss to the aircraft?
The left generator bus provides power to the standby battery bus, if loss of power the batteries in the ESIS will take over.
What does the NAV-4000 Consist of?
VOR/ILS and the ADF Function. The VIR-4000 Navigation Receiver is a fully integrated
VOR/LOC, Glideslope, Marker Beacon and ADF Receiver
Explain the RTA-852 Weather Radar Receiver/Transmitter.
Solid state X-Band radar system that shows in color upto 250 nautical miles, it is a one piece unit located in the nose of the aircraft.
What are the hazard distances of the Weather Radar?
2 feet, however a 15 foot arc should be flagged when testing.
What distances does the Radio Altimeter ALT-4000 provide?
Height above terrain from 2500 feet to touchdown, Used by flight guidance system and electronic flight system.
How does the Radio altimeter receive information?
The antenna beams a signal down to the terrain which bounces back to the antenna. the time it takes to make the round trip is how it is measured,
How does the TCAS1 system operate and where is this information displayed?
Interrogates ATC transponders in nearby aircraft to display potential collisions. it is projected on the MFD.
What is the purpose of the TCAS2 system?
To provide a protected airspace around the aircraft.
What mode type transponders does the TCAS2 system interrogate?
Mode C and Mode S
What will the TCAS2 system do when it senses a potential collison.
It will alert the pilot to climb, descend or maintain altitude.
Where is the EGPWS computer loacted?
In the nose shelf.
Where is the EGPWS config module located and how is it used?
Installed in the airplane wiring and is read by the EGPWS during power up.
What is the purpose of the TAWS+ system?
To prevent controlled flight into terrain accidents as well as provide ground proximity warnings.
Construction of the TAWS+ system?
Computer unit, Personality module + software, terrain database and obstacle database.
Whats warnings does the TAWS+ system give you?
Terrain caution, pull up warning or avoid terrain warning.
What 2 profiles does the TAWS+ compare? and what information do they provide?
Terrain environment using the GPS, Flight path used by flight path parameters to project the aircraft 2 minutes ahead of its current position.
Where is the TAWS+ information displayed?
PFD’s
What is the purpose of the aircraft personality module in relation to the TAWS+ system?
Storing aircraft specific configuration information. These are uploaded with operator callout selections during power up and upon request.
What information does the TAWS+ self test provide?
Serial numbers, data base part numbers, airplane config settings, system status and system failures.
What is the purpose of the GPS-4000 System?
To provide accurate worldwide navigation capabilities.
What does the NAV-4000 System consist of?
The baseline system consists of 1 receiver and 1 antenna. you have the option to add an extra receiver.
How does the GPS system function.
The antenna provides the receiver with radio frequency signals from the GPS sattelites, The antenna is an active receive only device operating within the L-Band freq of 1575.42 MHz
How does the GPS system function.
The antenna provides the receiver with radio frequency signals from the GPS sattelites, The antenna is an active receive only device operating within the L-Band freq of 1575.42 MHz
How does the GPS antenna operate?
Right hand circular polarisation and microscopy patch design.
How does the GPS receiver operate?
processes gps signals from the antenna as-well as inputs from other airplane sensors to provide position, velocity and time outputs.
How is GPS position data, date and time displayed?
In the colour GREEN, if data is flagged or missing it will be replaced with yellow dashes.
Explain the DME-4000 system
3 Channel unit designed to provide position navigation information
How does the DME system work.
By measuring the rate of closure and time to reach the destination between the aircraft and the selected ground station.
What are DME channel assignments mostly paired with?
VOR and ILS facilities.
How many channel assignments does the DME operate on?
252, each 1 MHz wide.
What is the purpose of the maintenance diagnostic system?
To aid in detecting and troubleshooting airplane component problems.
What does the Maintenance Diagnostic system consist of?
Maintenance diagnostic computer for hardware functionality and the Maintenance diagnostic table for data.
How many antennas are there for the Radio Altimeter system and what are their purposes?
2 - One to transmit and receive signals.
