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The FMGS does not consider the trip wind for alternate predictions.
The trip wind is used as long as no winds are entered in the CLB, CRZ and DES WIND pages.
When the pilot enters a CLB, CRZ or DES WIND, the FMGS disregards the trip wind.
PRESS the INIT key
INSERT the temperature at cruise FL
On the INIT B page INSERT the TRIP WIND
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.
CHECK the predictions on the F-PLN B 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) through ACARS system (Refer to
DSC-22_20-70 FLIGHT PLAN INITIALIZATION THROUGH ACARS OR ATSU)
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 forecast wind profile (by linear interpolation and propagation).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-20-25 P 4/12
FCOM 19 AUG 10
ENTERING THE WIND AND TEMPERATURE DURING F-PLN INITIALIZATION
When completing the INIT A page and once the wind and cruise FL temperature forecasts are
available, the pilot may enter them, if significantly different, by pressing the wind prompt.
He will access the different wind pages using NEXT PHASE key and PREV PHASE key. He will
slew the CRZ WIND page to access the various waypoints of the cruise winds.
The pilot will 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) on the CLIMB WIND page.
for cruise phase ; by inserting winds (at up to 4 FL) at various CRZ waypoints on the CRZ‐
WIND pages. The 4 levels are the same for all the cruise waypoints. The pilot may enter the
temperature of each waypoint and at destination on this page.
For descent phase ; by inserting winds (at up to 5 FL/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) through ACARS system (Refer to
DSC-22_20-70 FLIGHT PLAN INITIALIZATION THROUGH ACARS OR ATSU)
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 from an empty field, a wind entry is performed, direction/velocity/altitude (or flight level)
must be entered simultaneously. One entry in each bracket.
Overwriting a wind cancels the previous one.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-20-25 P 5/12
FCOM 19 AUG 10
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.
ENTERING THE HISTORY WIND (F-PLN INITIALIZATION)
The pilot may insert the history wind but cannot modify this page.
If convenient, PRESS the (6R) prompt to insert. After insertion, the [6R] prompt is suppressed but
the page still displays the wind values for information.
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 into the scratchpad and ENTER.
Winds entered on CLIMB, CRZ and DESCENT WIND pages are always true North referenced.
Tower wind entered on PERF is magnetic referenced.
The pilot can enter “GRND” in the altitude field for wind at destination.
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 extrapolates the highest wind entry to all higher levels.
The system interpolates winds between 2 entered levels.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(87)
