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OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
A wind is written as true direction/velocity/flight level or altitude in feet.
If the crew enters “GRND” in the altitude field , the system uses the associated wind as wind
at destination.
The descent profile is corrected, as well as the tower wind entered in the PERF APPR page.
When the winds have been entered, the F-PLN B page displays the forecast wind profile at all
descent waypoints using values it has interpolated from manual entries. Descent winds are not
modifiable when descent, approach or go around phase is active. At descent phase transition, wind
data changes color from blue to green and any attempted modification triggers the “NOT ALLOWED”
message.
Alternate wind is entered in the DESCENT WIND page. The altitude is blanked if no alternate
destination is defined.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
If an alternate wind is not defined, the predictions are computed with a wind defaulted to
zero.
Alternate wind can be modified at any time.
The wind at destination is entered on the PERF APPR page, [3L] field. It is a magnetic referenced
wind, copied in true reference into DESCENT WIND page at ground level (GRND) and F-PLN B
page at destination. A ground entry on the 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
PRESS the NEXT PHASE key [6R], to reach PERF APPR page.
WRITE the surface wind (magnetic) in the scratchpad and ENTER it in the [3L] field.
CONSTANT MACH
Applicable to:
,
,
MSN,,
4538,,
The crew can specify a part of the F-PLN to be flown at a given Mach value, using the Constant
Mach function.
Only one Constant Mach segment may be defined in the active flight plan, and one in the secondary
flight plan. No Constant Mach segment can be defined in the alternate flight plan.
SELECT the F-PLN key on the MCDU.
SELECT VERT REV at any F-PLN waypoint.
SELECT the CONSTANT MACH prompt [ 4L ], to access the CONSTANT MACH page.
ENTER the desired Mach value in the [ 1L ] field.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
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FCOM 19 AUG 10
SELECT the Start waypoint [ 2L ] and End waypoint [ 2R ] within the list of selectable waypoint (3L →
5L, 3R → 5R, “SELECTABLE F-PLN WPTS”).
When accessing the CONSTANT MACH page, the Start waypoint is defaulted to the waypoint at
which the VERT REV has been performed (provided it is a cruise waypoint). The End waypoint is
defaulted to the Top of Descent (T/D).
ACCESS the temporary flight plan by pressing [ 6L ] key. Revise as necessary.
INSERT the temporary flight plan by pressing [ 6L ] key.
To delete a previously-entered Constant Mach :
SELECT the F-PLN key on the MCDU
SELECT VERT REV at any F-PLN waypoint
SELECT the CONSTANT MACH prompt (4L)
SELECT the CONSTANT MACH DELETE prompt (6R)
The Constant Mach is deleted.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
Intentionally left blank
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FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
PERFORMANCE - OPTIMIZATION
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FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The performance function:
‐ Optimizes a flight plan
‐ Computes predictions.
OPTIMIZATION
Applicable to:
The FMGC minimizes cost by optimizing the following items:
‐ Takeoff, approach, and go-around speeds (F, S, Green Dot, VAPP)
‐ Target speed for CLB, CRZ and DES phases (ECON SPD/MACH)
‐ Flight Level (for flight crew's information)
‐ Descent profile from CRZ FL down to the destination airport.
These items depend on the data the flight crew inserts during lateral and vertical flight planning and
revision procedures.
Most are displayed on the PERF pages associated with the appropriate flight phases.
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 1(115)
