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the associated pseudo-waypoints.
It is possible to convert an optimum step to a geographic step by overwriting the [1L] field (see
geographic step).
When reaching the step climb pseudo-waypoint (S/C) :
REQUEST climb clearance
ADJUST the FCU altitude to the STEP ALT, and PUSH the FCU knob.
ENTERING A GEOGRAPHIC STEP (STEP CLIMB OR STEP DESCENT)
WRITE a step altitude and waypoint into the scratchpad.
The format is :
• Altitude (or FL)/waypoint (Ex :FL 350/BERAD)
• Altitude (or FL)/waypoint/distance (Ex : FL 350/BERAD/-20)
The waypoint must be in the flight plan.
ENTER it in [1L] to [4L] field.
It is possible to independently modify either the location or the altitude of an existing step
altitude. It is not possible to modify with a single entry both the location and the altitude : An entry
“waypoint/xxx” will be taken by the system as an along track offset of xxx nautical miles.
CHECK the predictions (distance, time).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A318/A319/A320/A321 FLEET PRO-NOR-SRP-01-50 P 13/26
FCOM 19 AUG 10
When reaching the step climb or descent pseudo-waypoint (S/C or S/D) :
REQUEST climb or descent clearance
ADJUST the FCU altitude to the STEP ALT, and PUSH the FCU knob.
The DIST/TIME field may display the following messages :
ABOVE MAX if the ‐ step altitude exceeds the MAX ALT.
‐ IGNORED if the start step point is less than 50 nm from the top of descent.
‐ STEP AHEAD when the aircraft is within 20 nm of the step point.
If the aircraft overflies the step pseudo-waypoint without commencing a climb or a descent,
the system deletes the step from the vertical F-PLN automatically (a “STEP DELETED”
message is displayed on the MCDU scratchpad), and recomputes the predictions.
The step is not deleted if the FCU altitude is moved only partially towards the step altitude.
The flight phase remains “cruise” whenever a step is initiated.
Note: For an altitude restriction defined at a waypoint less than 50 nm before the top of
descent and lower than the CRZ FL, it is recommended to enter an altitude constraint
rather than a step.
IMMEDIATE CHANGE OF LEVEL IN CRUISE
Applicable to: ALL
When the pilot changes his flight level without inserting a step :
If the FCU-selected altitude is above the previous CRZ FL the CRZ FL on the PROG
page changes to the new flight level.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A318/A319/A320/A321 FLEET PRO-NOR-SRP-01-50 P 14/26
FCOM 19 AUG 10
If the FCU-selected altitude is lower than the previous CRZ FL and if the distance to
DEST is more than 200 nm, the CRZ FL on the PROG page changes.
In that case Mach target is managed as follows :
At the start of the descent, the Mach target is the managed ‐ Mach number at the initial
cruise flight level.
‐ When the aircraft reaches the new flight level, the Mach target switches either to the
Mach number for the lower CRZ FL, or to the speed for the lower CRZ FL if the aircraft
reaches the crossover altitude. This logic prevents the aircraft from exceeding VMO during
descent.
If the FCU-selected altitude is lower than the previous CRZ FL and the aircraft is
within 200 nm of its destination, the system activates the descent phase.
The pilot may reactivate the cruise phase by entering a new cruise flight level in the PROG
page.
PREPARATION FOR DESCENT AND APPROACH
Applicable to: ALL
GENERAL
The preparation for descent and approach consists of :
‐ Entering PERF and WIND data
‐ Defining the lateral and vertical F-PLN
‐ Checking the tuning (auto or manual) of the appropriate navaids
After receiving the arrival information, the flight crew should use the following procedure.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A318/A319/A320/A321 FLEET PRO-NOR-SRP-01-50 P 15/26
FCOM 19 AUG 10
Applicable to:
REVISION OF LATERAL F-PLN
PERFORM a lateral revision at destination
SELECT an ARRIVAL
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A318/A319/A320/A321 FLEET PRO-NOR-SRP-01-50 P 16/26
FCOM 19 AUG 10
SELECT an APPROACH, a STAR, a TRANSITION, a VIA.
When the pilot selects successive items, the page are automatically sequenced. But pressing
NEXT PAGE key brings up the APPR and STAR page successively.
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 12(74)
