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ENTERING THE CLIMB WIND (F-PLN INITIALIZATION)
�� If history winds are not convenient:
SELECT CLIMB WIND page from INIT A page or VERT REV page.
WRITE new winds in the scratchpad and ENTER them in the empty fields.
The crew can enter "GRND" in the altitude field to specify the wind at ground level, at the
departure airport.
CLIMB WIND cannot be modified when the climb phase is active.
At climb phase transition, wind data switches from blue to green colour and any attempted
modification will trigger the "NOT ALLOWED" message.
The system interpolates winds between 2 entered levels.
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 6/12
FCOM 19 AUG 10
A flight plan initialization, the CRZ WIND page displays all cruise waypoints with empty brackets. In
flight, only downpath waypoints are displayed.
SELECT INIT or VERT REV at WPT.
PRESS the WIND DATA prompt.
SELECT NEXT PAGE, to reach the CRUISE WIND page.
For each desired waypoint :
SCROLL until the waypoint is displayed.
WRITE the new temperature and altitude in the scratchpad, and ENTER it.
WRITE the new wind data and altitude in the scratchpad, and ENTER IT
WIND and temperature may be entered through the ACARS pages. Refer to DSC-22_20-70-B WIND
DATA - REQUEST FOR WIND DATA.
Then, when wind update is complete for all these waypoints :
PRESS the UPDATE INSERT prompt.
The wind profile is updated and predictions are re-computed only once this prompt is pressed.
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 7/12
FCOM 19 AUG 10
The crew should modify the entered winds and temperatures in flight,
�� If a significant difference is expected (greater than 30 kt or 30 °C for the wind data and
greater than 5 °C for the temperature).
The FMS propagates the crew (or ACARS) wind and temperature entries downpath, until a
waypoint for which a different temperature or wind has been entered (for the same flight level), or
until the last cruise waypoint.
The forecast winds at a waypoint are determined as follows :
�� If the predicted altitude at the waypoint matches an altitude defined in the CRUISE
WIND page, the forecast wind is the corresponding entered or propagated wind, displayed
at that waypoint on the CRUISE WIND page.
�� If the predicted altitude lies between two altitudes entered on the CRUISE WIND page,
the wind direction and velocity are linearly interpolated.
�� If the predicted altitude is above or below the set of CRUISE altitudes, the forecast
wind is a constant value extrapolated from the entered or propagated wind at the highest (or
lowest) altitude displayed on the CRUISE WIND page for that waypoint.
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 8/12
FCOM 19 AUG 10
Once in flight, the FMGS considers the real, measured wind up to 100 nm ahead of the aircraft, to
permanently update the wind profile. This updated wind profile is used to compute the predictions
and the performance data, but is not displayed to the crew. The CRUISE WIND pages display the
propagated values in small cyan font, and the crew (or ACARS) entries in large cyan font.
Note: The CRUISE WIND page displays ACARS data, crew-entered data or propagated data.
It never displays computed data (displayed on the F-PLN B page only).
The OPT FL computation considers the wind entries made at different altitudes (normally at the
different CRZ FL).
When flying the subsequent CRZ FL, the OPT FL proposed by the PROG page may be affected by
the wind entries made at the previous CRZ FL ; these winds are automatically propagated and may
be significantly different from the actual winds.
We recommended the following procedure :
�� if the propagated winds at the lower altitudes are significantly different from the actual
winds, enter the wind at these altitudes, or if not available, the wind measured at the
current CRZ FL.
The crew will enter as many as one wind at 5 different FL or altitudes. This wind data will be used for
descent profile and prediction computation.
From the vertical revision page, or from the CRUISE WIND page :
PRESS the WIND prompt.
SELECT the DESCENT WIND page.
ENTER up to 5 different “wind/altitude”.
A318/A319/A320/A321 FLIGHT CREW
　
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