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and maximum recommended cruise flight levels. It enables the flight crew to
update the FMGS position and to obtain a bearing and distance to any location.
PERF Calls up the performance pages, that display the optimum speed or Mach number
for each phase. The flight crew can amend these pages. The first page to be
displayed is the one corresponding to the current flight phase (except for preflight
and done phases).
The flight crew can then use the appropriate 6L or 6R LSK to call up pages
corresponding to future flight phases.
INIT Calls up the flight plan initialization A page, which also gives the flight crew
access to the B page. The flight crew uses the INIT pages to initialize Flight
Management for the flight.
The flight crew uses the INIT A page primarily to insert his flight plan and to align
the inertial reference system.
The flight crew uses the INIT B page to insert aircraft weight, fuel on board, CG
and various fuel requirements. The FMGS uses this data to compute predictions
and fuel planning parameters.
The flight crew has access to the INIT A page only in the preflight phase.
INIT B page (not accessible after engine start) is called up by pressing the "NEXT
PAGE" key.
DATA Calls up the data index page. This gives the flight crew access to various
reference pages that show aircraft position, aircraft status, runways, waypoints,
navaids, routes, and data stored by the flight crew.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A318/A319/A320/A321 FLEET DSC-22_10-40-10 P 17/22
FCOM 19 AUG 10
F-PLN Calls up the flight plan A and B pages, which contain a leg-by-leg description of
the active primary flight plan.
The flight crew can use the slewing keys to review the entire active flight plan.
They can make all lateral and vertical revisions to the flight plan through these
pages, using the left LSKs for lateral revision and the right keys for vertical
revision.
RAD NAV Calls up the radio navigation page. This page displays the Radio Navaids tuned
automatically or manually through the FMGC.
FUEL PRED Calls up the fuel prediction page. Once the engines are started, this page
displays the fuel predicted to be remaining at the destination and the alternate, as
well as fuel management data.
SEC F-PLN Calls up the index page for the secondary flight plan. The flight crew can use
this page to call up the secondary flight plan and all the functions related to it
(copying, deleting, reviewing, activating, and the INIT and PERF pages).
MCDU MENU Calls up the MCDU MENU page, which displays the subsystems currently
addressed via the MCDU. The key next to the name of a subsystem enables the
flight crew to select that subsystem.
When the MCDU MENU annunciator lights up, the flight crew should press the
MCDU MENU key. The menu will have [REQ] displayed next to the name of the
subsystem that requires attention.
Applicable to:
MCDU FUNCTION KEYS
The function keys on the Multipurpose Control and Display Units allow the flight crew to call up
MCDU pages quickly.
The following is a summary of the purpose of each key:
DIR Calls up the DIR TO page, and enables the flight crew to proceed directly from
the present position to any waypoint, entered manually or selected in the active
flight plan.
PROG Calls up the progress page corresponding to the phase of the active flight plan
that is in progress.
This page displays navigation information and active data such as the optimum
and maximum recommended cruise flight levels. It enables the flight crew to
update the FMGS position and to obtain a bearing and distance to any location.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
PILOT INTERFACE - MCDU
A318/A319/A320/A321 FLEET DSC-22_10-40-10 P 18/22
FCOM 19 AUG 10
PERF Calls up the performance pages, that display the optimum speed or Mach number
for each phase. The flight crew can amend these pages. The first page to be
displayed is the one corresponding to the current flight phase (except for preflight
and done phases).
The flight crew can then use the appropriate 6L or 6R LSK to call up pages
corresponding to future flight phases.
INIT Calls up the flight plan initialization A page, which also gives the flight crew
access to the B page. The flight crew uses the INIT pages to initialize Flight
Management for the flight.
The flight crew uses the INIT A page primarily to insert his flight plan and to align
the inertial reference system.
The flight crew uses the INIT B page to insert aircraft weight, fuel on board, CG
　
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