Avionics Flashcards
(44 cards)
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
