Avionics Flashcards
Describe Modular Avionics Units
(MAU’s).
They’re the main computers and processors that
control most avionics related applications on the
aircraft.
Ref: PTH
Describe the function of Touch
Control Steering (TCS) button.
When pressed and held, it momentarily interrupts the
autopilot.
Ref: PTH
Which display units (DU’s) are
referred to as Multifunction Displays
(MFD’s)?
DU #2 and 3
Which DU can be failed for
dispatch?
DU #3
What limitation is placed on use of
the switches located on DISPLAY
SYSTEM CONTROL panel?
They’re for ground use only (i.e., for MEL dispatch
ability)
Ref: AOM 2B
What’s the primary purpose of
SMC
To display Standby Flight Display (SFD)
Ref: AOM 2B
Name some occasions when SFD is
automatically displayed.
Loss of:
PFD
Unusual attitudes
Break power transfer
Instrument comparison issues
SFD failure of either
Ref: AOM 2B
Can you dispatch with failure of
cursor control device (CCD)?
Yes, you can dispatch with failure of one or both
CCD’s.
Ref: MMEL
What part of the displays is the
cursor restricted from entering?
ADI; otherwise, it can move anywhere in a display
window on its associated DU’s. It’s further restricted
with SVS.
Ref: AOM 2B
What happens if both cursors are
selected to same DU?
Last cursor wins and first cursor is removed from the
display.
Ref: AOM 2B
What’s the purpose of Guidance
Panel (GP)?
It provides most of controls for operation of
Automatic Flight Control System (AFCS).
Ref: AOM 2B
What’s the source of information to
DU’s?
Three (3) MAU’s, three (3) MCDU’s and other
sensors
Ref: AOM 2B
What does an amber MAG2 indicate
on both PFD’s?
It alerts the crew that both pilots are using same
source for heading information: in this case, IRS #2.
Ref: AOM 2B
What does it mean when ALT is
boxed in cyan on ENG ALT CTRL
page of SMC?
Indicates the engine is operating in alternate control
mode (i.e., engine computer controlling the speed of
LP)
Ref: AOM 2B
How does the FMS compute VREF
speed?
s based solely on flap handle position, current
aircraft weight and altitude
Ref: AOM 2B
What does it mean to preview a
course?
PREVIEW prompt on SMC enables the crew to
select a short range NAV source for display on HSI
even though FMS (long range navigation) is still the
active Nav source.
Ref: AOM 2B
What’s the normal display location
of primary engine instruments and
CAS?
When 2/3 window format is selected for DU2 and
DU3, primary engine instrument information is
always displayed in upper 1/6 window on DU2. CAS
information is normally displayed in upper 1/6
window on DU3.
Ref: AOM 2B
What’s the source of HUD symbols?
HUD computer
Ref: AOM 2B
What is NUC?
NUC stands for Non-Uniformity Correction. It’s a
calibration process that results in cleaner picture and
occurs during camera power-up, flaps selected from
0° to 10° or, manual NUC selected.
Ref: AOM 2B
What does Aircraft Reference
symbol (or Boresight symbol)
represent on the HUD
Projected centerline of aircraft (boresight)
Ref: AOM 2B
Name some functions controlled and
monitored from UTIL menu of
SMC.
Tire pressure display, semi-mode CPCS controller,
refuel controller which also continuously displays
fuel quantity, engine oil display, and hydraulic fluid
quantity display
Ref: AOM 2B
What’s the source of EVS image?
EVS camera, unlike the HUD, uses infrared
technology and is optimized to detect runway
lighting.
Ref: AOM 2B
Describe the three (3) levels of EVS
camera gain
AUTO, H for high, and L for low. Select AUTO if
you want camera to automatically adjust the gain, H
for low visibility, and L for night VMC or day with
smog. Selection indications appear on upper left
portion of combiner: EVS A for AUTO, EVS H for
high, or EVS L for low.
Ref: AOM 2B
Describe operation of EVS WSHLD
HT switch.
When selected, switchlight indicates blue ON and
two minutes of continuous heat is provided to EVS
windshield. Otherwise, operation is automatic if
aircraft is airborne and cowl anti-ice is ON.
Ref: AOM 2A
How is heat depicted on EVS
image
Hotter items from IR camera are depicted on FLIR
synoptic video page as lighter while items with less
heat are depicted as darker
Ref: G650-P-AVN presentation
Describe some factors that affect
EVS performance.
Thick clouds, thermal crossover, blooming, and
misalignment
Ref: G650-P-AVN presentation
What are the requirements for
descending below DA with EVS?
You need EVS lights to descend below DA and you
need visual cues without the aid of EVS at 100 ft
above TDZE in order to continue and land.
Ref: FAR 91.176(b)
At what altitude does airport symbol
normally appear on the HUD?
2000’ above airport
Ref: AOM 2B
What is RNP?
Required Nav performance is the accuracy in NM
required for navigation in the area the aircraft is
flying and affects CDI sensitivity (i.e., lower RNP
equates to greater CDI sensitivity).
Ref: AOM 2B
What is EPU?
Estimated position uncertainty is the calculated
estimate of accuracy of navigation equipment aboard
the aircraft. If EPU exceeds RNP, numbers are
highlighted by cautionary amber overlay and CDI
needle turns amber.
Ref: AOM 2B
The alerting function is performed
by Monitor Warning Function
(MWF) installed within MAU. How
is this labeled on SMC?
FWC for Fault Warning Computer
Depressing GPWS ORIDE switch
on either Master Warning panel
inhibits all GPWS aural warnings
and cautions except for what?
Windshear
Ref: AOM 2B
what kind of situation would you
depress GPWS ORIDE switch?
Used to inhibit GPWS alerts while flying day VFR
approach in areas of high terrain
Ref: PTH
When is INHIBIT automatically
deselected?
On takeoff or go-around at 400 feet AGL if landing
gear is retracted. After landing, it remains selected
until shutdown unless manually cancelled.
Ref: AOM 2B
What would a big red X indicate on
a DU?
Loss of data (i.e., failure of associated AGM)
Ref: AOM 2B
What would be indicated if a DU
had a black display?
DU has failed or is unpowered
Ref: AOM 2B
Which displays are considered most
important
In terms of hierarchy, PFD’s are considered most
important followed by engine instrument display and
CAS.
Ref: AOM 2B
If DU1 fails and is subsequently regained by performing Display Unit (DU) Failure procedure in QRH, the PFD comes back on DU1 and also remains displayed on DU2. How can you unlatch the display and regain your MAP or synoptic?
In flight, you’ll need to hold SMC “2/3” selection
switch capsule in depressed position for three (3)
seconds
Ref: QRH
The autopilot is fail operational or
fail passive. What does that mean?
If one fails, it automatically switches to the other
Ref: AOM 2B
What is FLCH mode?
In all cases, FLCH modes are speed hold modes (IAS
or MACH), meaning the aircraft changes pitch as
required to maintain whatever speed is being
displayed in GP’s speed window.
Ref: PTH
When VGP is the engaged vertical
mode, what’s the effect of any
altitude set in GP’s altitude preselect
window?
It’ll be ignored by AFCS just as in the case of an ILS
approach
Ref: PTH
When is retard mode activated?
Radio altitude < 50 feet and gear down
Ref: PTH
What are the long range sensors on
G650?
Two (2) GPS’s and three (3) IRU’s. Hybrid IRS’s are
primary source of navigation input to MCDU’s: they
receive GPS input which greatly improves accuracy
and reduces drift rate. If both GPS’s fail or entire
GPS network goes down, FMS or MCDU uses a
performance based sensor selection scheme that
looks at the EPU of each sensor to select best
performing sensor.
Ref: AOM 2B
What are the primary short-range
sensors on G650?
VOR/DME and DME/DME
Ref: AOM 2B
