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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
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FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
FMS LEGACY
GENERAL
Applicable to:
The vertical revision function allows the pilot to modify the following parts of the flight plan :
The Speed limit (SPD LIM)‐
Speed and altitude constraints‐
Wind‐
Step climb or step descent‐
The crew calls up the VERT REV page by pressing the right key on F-PLN A or B page.
Note: This chapter only describes the wind and time constraint.
For other vertical revision functions Refer to PRO-NOR-SRP-01-05 INTRODUCTION.
TIME CONSTRAINT
Applicable to:
GENERAL
A time constraint (TIME CSTR) is a time requirement to be met over a specified waypoint of the
lateral flight plan, including destination but excluding the origin and FROM waypoints.
At most, two time constraints may exist : one in the active flight plan
one in the secondary flight plan.
When a second time constraint is entered in a flight plan, the first one is deleted.
The time constraint entry is not allowed in Engine Out mode or once the aircraft is in descent or
approach phase or go around.
A time constraint is displayed in magenta as long as the predictions are not computed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
Once the predictions are available, the time constraint value is replaced by the predicted time at
the related waypoint, highlighted by a star (*) :
if the TIME CSTR is predicted as matched, the star (*) is magenta‐
if the TIME CSTR is predicted as missed, the star (*) is amber.‐
No specific symbol is provided on the ND.
A time constraint is cleared as any other constraints. If a time constraint is automatically deleted, a
“TIME CSTR DELETED” message is displayed on MCDU.
TIME CSTR ENTRY
SELECT the F-PLN key on MCDU
SELECT a VERT REV at revised WPT
WRITE the TIME CSTR into the scratchpad then ENTER it
The display automatically reverts to the F-PLN A page.
WIND - TEMPERATURE - QNH
Applicable to:
GENERAL
In order to receive the best predictions, the pilot must enter wind and temperature values for the
different phases and for various waypoints of the cruise phase.
The system uses the temperature value at a given altitude, associated with the tropopause as
entered on the INIT A page to optimize the temperature profile.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
ENTERING THE TRIP WIND AND TEMPERATURE DURING THE F-PLN INITIALIZATION
The trip wind is a mean wind component for the entire flight from origin to destination. The pilot
can enter it before engine start on the INIT B page. 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 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
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