Navigation System Flashcards
(T/F) The flight crew must select and enter what mode they would like for the Inertial Reference Units (IRUs)
False. It is automatic
A stationary alignment of the IRU takes between ___ and ___ minutes
5 to 17 minutes
An Alignment In Motion (AIM) for the IRU takes between ___ and ___ minutes
15 to 30 minutes
IRS X ALIGNMENT in ____ on EICAS means what?
Blue. Means an Alignment In Motion (AIM) is being conducted
(T/F) The IRU’s receive primary and secondary power from two different sources, thus if one loses power the other will continue to run.
True
Pushing the IRS button on the reversionary panel does what?
Flight Director (FD) disengages Autopilot (AP) disengages The annunciation on the PFD changes to IRS 1 or IRS 2 accordingly
Note… The AP and FD can be reengaged once the system switches IRS
(T/F) All GPS fault messages will go through the EICAS
False. All GPS fault messages will go through the MCDU
GPS RAIM ABOVE LIMIT on the MCDU means what?
The GPS has lost integrity
RAIM WILL EXCEED LIMIT on the MCDU means what?
The GPS integrity exceeds the limit
GPS RAIM UNAVAILABLE on the MCDU means what?
RAIM is not available
A mode __ transponder is installed in the aircraft
Mode S
The transponder automatically switches to on-ground mode after the aircraft touches down and is below ___ kts
50 kts
(T/F) Should the weather radar lose its primary power source it will automatically switch to its backup source
False. There is no backup power supply for the weather radar. Should the primary power source fail, the weather radar is failed
(T/F) The weather radar can only be in one mode for the entire crew. I.e. The captain can’t be in GMAP mode while the FO is in WX mode.
False. They can be in different modes
The turbulence mode in the weather radar can only be selected in the ___ mode and with a range of ___ nm or less
WX mode with ranges of 50 nm or less
The TGT mode on the weather radar does what?
Alerts for any possible red or magenta weather in your flight path, but outside visible range. The TGT will turn from green to amber if this is detected. If this happens you should zoom out your range
The normal radar sweep is +/- ___ deg. from the aircraft nose at a rate of ___ sweeps per minute.
Selecting the SECT button reduces the angle of the sweep to +/- 30 deg. and increases the sweep rate to ___ sweeps per minute
Normal is 60 deg. with 12 sweeps per minute
SECT mode is 30 deg. with 24 sweeps per minute
Radar tilt can be changed by _____,and has a range of ___ deg. up and ____ deg. down.
The inner knob on the CCD when in calibrated gain.
15 deg. up and 15 deg. down
The Altitude Compensated Tilt (ACT) button does what?
Adjusts tilt based on altitude and range to automatically select the best tilt angle. The tilt knob can still be used to change the tilt by up to 2 deg.
The Raid Echo Attenuation Compensation Technique (RCT) function does what?
The RCT function permits the radar receiver to automatically adjust sensitivity to compensate for attenuation losses as the radar pulse passes through weather targets on its way to illuminate other targets
Cyan cones on the weather radar means what?
Any weather in the cyan is not shown due to radar attenuation. This area should be avoided and considered severe weather
