EFIS Flashcards
EFIS stands for
electronic flight information system
EFIS generally
replaced older mechanical instruments
its integrated
its reliable
it allows prioritisation of information
EFIS components
EADI- electronic attitude directional indicator (PFD)
EHSI- electronic horizontal situation indicator (ND)
symbol generator (x2 or x3)
EFIS MCP - mode control panel
ambient light sensor unit
EFIS inputs
ADC IRS FMS AFDS (auto flight director system) Radio aids Wx radar GPWS TCAS Radio altimeter
EFIS display types
CRT- cathode ray tube- gets hot (older)
LCD- liquid crystal display (newer)
Symbol generators
converts the info from all available sources and converts into a common format for display on the screens
source failure
source unreliable: shows value with amber dashes through it
source lost: shows failure flag replacing the data
screen failure
cannot get screen back
data can be displayed on another screen
symbol generator failure
loss of associated screens
screens recover by switching to back up SG
ambient light sensor
auto adjusts screen brightness
manual control also available
FPV or aircraft symbol
FPV- shows flight path of the aircraft
aircraft symbol- shows where the nose of the aircraft is pointing
either would be on an attitude part of PFD
EFIS colour coding
green- engaged modes (AP), active/ selective modes
white- armed modes (AP), range scales, current status, data
magenta- pointers, route, fly to information
cyan- non active and background info
red- warning
amber- caution
black- background or off
EFIS MAP mode
orientated round the aircraft
no deviation bars
normal mode used in flight
EFIS plan mode
orientated to true north (N with up arrow shown)
can not get full rose view
EFIS VOR mode
orientated around the aircraft
lateral deviation bar
