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with the primary one being the ECON mode.
The ECON mode can be tailored to meet specific airline
requirements using a selectable Cost Index (CI).
A Cost Index is defined as the ratio of cost of time
to the cost of fuel .
The fuel quantity is given by the Fuel Quantity and
Indication Computers (FQICs).
The speed and the thrust values associated with a given
Cost Index are used to determine the climb and descent
profiles.
FUEL and TIME are the main "actors" in this particular
part of the FM function and direct the airline choice.
DISPLAY
According to the pilot selection on the EFIS control
panel of the Flight Control Unit (FCU), the flight
plan is shown in relation to the aircraft position on
the ROSE-NAV or ARC modes.
The aircraft model is fixed and the chart moves.
The difference between the two modes is that the half
range is available when the Navigation Display (ND)
is set to ROSE-NAV mode as there is only frontal view
when it is set to ARC mode.
In PLAN mode, the flight plan is shown, with NORTH at
the top of the screen, centered on the TO waypoint.
Depending on the selected range, the aircraft may or
may not be visualized on this display.
The PLAN display can be decentered by scrolling the
flight plan on the MCDU.
The Primary Flight Display (PFD) shows the FM guidance
following engagement of the AP/FD lateral and
longitudinal modes.
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SELF EXAMINATION
What is flight planning?
A - The function that integrates the routes
the aircraft must follow and the
constraints to construct a flight plan.
B - The function that provides the aircraft
position and the follow-up of the flight
plan.
C - The ratio of cost of time to the cost of
fuel.
In which mode(s) is(are) the aircraft model
represented fixed?
A - Whatever the pilot selection on the FCU
(ROSE-NAV, ARC or PLAN modes), the
aircraft model is fixed.
B - The aircraft model is fixed only on the
PLAN mode representation.
C - The aircraft model is always fixed
except on the PLAN mode representation.
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22 - AUTO FLIGHT SYSTEM
22-82-00 MCDU DESCRIPTION
CONTENTS:
General
Brightness Adjust Control
Alphanumeric Keys
Page Keys
Display Keys
Line Select Keys
Annunciators
Display Layout
Data Entry
Color Code
Self Examination
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MCDU DESCRIPTION
GENERAL
The Multipurpose Control and Display Unit (MCDU) is
the pilot interface with the Flight Management function
of the Flight Management and Guidance Computer. It is
also used as an interface with other aircraft systems.
The MCDU is mainly used for long term actions such as
flight plan construction, flight plan monitoring and
revision.
BRIGHTNESS ADJUST CONTROL
The brightness (BRT) knob allows the MCDU display
brightness and keyboard illumination to be adjusted.
NOTE: This knob does not permit the MCDU to be switched
off.
ALPHANUMERIC KEYS
The alphanumeric keys are used to write data on the
bottom line of the screen, called SCRATCHPAD.
PAGE KEYS
Each management function is shown on a specific display
called a page. By pressing the related key, the
corresponding page is displayed.
In this example, the DATA INDEX page has been obtained
by pressing the DATA key. This page allows access to
the numerous data pages stored in the data base and
to define and view new data.
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