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FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-20 P 9/10
FCOM 19 AUG 10
ENTERING THE ALTERNATE WIND
Alternate wind is entered on the DESCENT WIND page. If an ALTN wind is not defined, the
predictions are computed with a wind defaulted to zero. Alternate wind can be modified at any
time. In addition, the alternate cruise (ALTN CRZ) level defaults to :
FL 220, if the length ‐ of the alternate flight plan (ALTN F-PLN) is less than 200 nm.
‐ FL 310, if the length of the ALTN F-PLN is greater or equal to 200 nm.
ENTERING THE APPROACH WIND
The wind at destination is entered on the PERF APPR page 3L field. It is a magnetic referenced
wind, copied in true reference into DESCEND WIND page at ground level (GRND) and F-PLN
B page at destination. A ground entry into DESCENT WIND page is in the same way, copied to
F-PLN B page and PERF APPR page (Magnetic) automatically. This wind is modifiable in descent
and approach and go around phase.
SELECT the PERF key on the MCDU
DEPRESS the NEXT PHASE key (6R)
WRITE QNH and ENTER it
WRITE the surface wind (magnetic) into the scratchpad and ENTER it.
Note: At each wind entry, the descent profile is recomputed, therefore it is recommended to
enter all winds, temperature and QNH at the same time to minimize recomputation time.
WIND
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-22_20-30-20-20 P 10/10
FCOM 19 AUG 10
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_20-30-20-25 P 1/12
FCOM 19 AUG 10
FMS2 HONEYWELL
GENERAL
Applicable to:
The vertical revision function allows the pilot to modify the following parts of the flight plan :
‐ Speed limit
‐ Speed and altitude constraints
‐ Time constraints
‐ Wind
‐ Step climb or step descent
‐ Constant Mach Segment
The pilot selects these functions by pressing the right key on flight plan A or B.
REQUIRED TIME OF ARRIVAL (RTA)
Applicable to:
GENERAL
A Required Time of Arrival (RTA) 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. When the
predictions are available, the time constraint value is replaced by the predicted time at the related
waypoint, highlighted by a star (*) :
‐ If the RTA is predicted as matched, the star (*) is in magenta.
‐ If the RTA is predicted as missed, the star (*) is in amber.
No specific symbol is provided on the ND.
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_20-30-20-25 P 2/12
FCOM 19 AUG 10
A time constraint is cleared in the same way as any other constraints. If a time constraint is
automatically deleted. The MCDU displays an “RTA DELETED” message.
ENTERING A REQUIRED TIME OF ARRIVAL
SELECT the F-PLN key on the MCDU.
SELECT a VERT REV at the revised waypoint.
SELECT the RTA prompt (2R).
The MCDU displays the RTA page.
WRITE the identifier of the waypoint where the time constraint has to be defined.
ENTER it in the 1L field.
The RTA prompt and the distance indication appear.
WRITE the required time of arrival.
The format is +/- HHMMSS (entry of seconds is not mandatory).
ENTER it in the 1R field.
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_20-30-20-25 P 3/12
FCOM 19 AUG 10
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 the various waypoints of the 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.
ENTERING THE TRIP WIND AND TEMPERATURE DURING F-PLN INITIALIZATION
The trip wind is a mean wind component for the entire flight from origin to destination. The pilot
can enter it on the INIT B page prior to engine start. It is usually defined by the airlines’ flight
operations on the computerized flight plan.
　
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