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SELECT the RTA prompt (2R).
The MCDU displays the RTA page.
ENTER the waypoint where the time constraint has to be defined, in the [ 1L ] prompt.
The RTA prompt and the distance indications appear.
ENTER the required time of arrival, in the [ 1R ] field.
The format is +/- HHMMSS (entry of seconds is not mandatory).
CHECK the 2R and 3R fields to determine whether the entered constraint can be met.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-28 P 3/12
FCOM 19 AUG 10
WIND - TEMPERATURE - QNH
Applicable to:
,
,
MSN,,
4538,,
In order to receive the best predictions, the pilot must enter wind values for the different phases and
for various waypoints of cruise phase.
The system uses the temperature value at a given altitude, associated with the tropopause entered
on the INIT A page, to optimize the temperature profile.
The trip wind is a mean wind component for the entire flight from origin to destination. The crew can
enter it on the INIT B page before engine start. It is usually defined by the airlines’ flight operations
on the computerized flight plan.
The FMGS does not consider the trip wind for alternate predictions.
The trip wind is used, as a global wind during flight for both predictions and guidance, if no winds are
entered in the CLB, CRZ and DES WIND pages.
When the crew enters a CLB, CRZ or DES WIND, the FMGS disregards the trip wind, and the TRIP
WIND field on the INIT B page is dashed. Trip wind used for guidance is not relevant.
PRESS the INIT key.
INSERT the temperature at CRZ FL (6L field).
On the INIT B page, INSERT the TRIP WIND (6R field).
The trip wind, is defined as a headwind component (HDXX, XXHD or - XX), or as a tailwind (TLXX,
XXTL or + XX).
The FMGS uses the trip wind to compute preliminary performance, time and fuel predictions.
When completing the INIT A page, and once the wind and cruise FL temperatures forecasts are
available, the crew can enter them, if significantly different, by pressing the wind prompt.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-28 P 4/12
FCOM 19 AUG 10
The crew accesses the various WIND pages by using the NEXT PHASE and PREV PHASE prompts.
They can slew the CRZ WIND page to access the various wind values at each cruise waypoints.
The crew can enter wind data as follows :
For climb phase : By inserting either the HISTORY WIND ‐ data (as recorded during the last
descent), or by inserting winds (at up to 5 altitudes/FL) on the CLIMB WIND page.
For cruise phase : By inserting winds (at up to FL 4) at various ‐ CRZ waypoints on the CRZ WIND
pages. The 4 levels are the same for all the cruise waypoints. The crew may enter the temperature
at each waypoint on this page.
‐ For descent phase : By inserting winds (at up to FL 5 /altitudes) on the DES WIND page.
‐ For the ALTN F-PLN, an average wind may be entered on the DES WIND page for alternate
cruise flight level.
Note: ‐ Wind can be automatically received (and inserted) via the ACARS system Refer to
DSC-22_20-70-B WIND DATA - REQUEST FOR WIND DATA.
Once a CLIMB, CRZ, or DESCENT WIND is entered, the system ignores the TRIP WIND. Once
temperature and winds are inserted, the FMGS computes the ISA profile, and the F-PLN B page
displays the forescast wind profile (by linear interpolation and propagation).
WIND ENTRY RULES
When a wind entry is performed from an empty field, direction/velocity/altitude (or flight level) must
be entered simultaneously. One entry in each bracket.
Overwriting a wind cancels the previous one. Entered wind data can be cleared : The field reverts
to brackets.
Propagated wind cannot be cleared.
Entering a new altitude, over an existing altitude, replaces that existing altitude at all cruise
waypoints. Any winds entered at the overwritten altitude are lost at all cruise waypoints.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-28 P 5/12
FCOM 19 AUG 10
ENTERING THE HISTORY WIND (F-PLN INITIALIZATION)
The crew may insert the history winds, but cannot modify this page.
�� If convenient, PRESS the (6R) prompt on the HISTORY WIND page to insert them. After
insertion, the [6R] prompt is suppressed, but the page still displays the wind values for
information.
　
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