Navigation Flashcards
The airplane is equipped with two identical, independent, AHRSs, what information do they supply?
Attitude and heading to PFD, and heading to MFD, via IC–600
What is the purpose of the AHRU, which forms a part of the AH–900 AHRS version?
It contains three laser gyros, and three accelerometers mounted on the three axes to measure the airplane inertial motion 
Which system supplies the initialization data for the AHRS
FMS
With the radar REACT function active, what does the cyan field indicate?
The target cannot be calibrated, and should be considered very dangerous
How can the radar automatic standby function be overridden when the aircraft is on the ground?
Press, the STAB button four times within three seconds
What does and Amber ATT indication on the PFD indicate
Simultaneous activation of both pitch and roll comparison monitors ( roll info on PFD one, and PFD two differs by more than 6° and pitch info differs by more than 5°)
What indication will appear on the PFD and MFD compass cards if heading information is not available
The digital heading bug symbol is removed in a red fail annunciation is shown
What Amber caption is shown on the PFD when 1AHRS is supplying both sides or both AHRSs are supplying crossside
ATT one or ATT two
What is the purpose of the TGT setting on the radar?
The radar monitors beyond the selected range and 7.5° on each side of the aircraft heading. If a return with certain characteristics is detected in the monitored area, the target alert TGT label shown on the PFD and MFD changes from the green armed condition, yellow TGT warning condition
What does an Amber H on the PFD next to the DME distance indicate
That the DME is in hold mode, and that the active DME channel is selected separately from the active VOR/ILS frequency
The FMS position information uses the most accurate sensors available. What is the sensor order of priority?
GPS, DME/DME, DME/VOR, IRS
To select FMS as navigation source on the PFD and MFD, which button should be pressed
FMS button on the display control panel
If position information is lost from all sensors, or inhibited, how will the FMS system react
The FMS will first go into “degrad” mode for two minutes, then, into DR mode, using the last available AHRS/IRS heading, airspeed, and wind data
How often is the navigation database updated?
Every 28 days
When is an active flight Plan considered closed.
When the last waypoint is the destination
