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above the destination elevation :
The FMGS maintains the V/S at –500 ft/min and the target speed, until the aircraft
intercepts either the altitude constraint or the descent profile.
�� If the rate of descent has to be increased (ATC requirement) :
SELECT OP DES mode.
Increase the target speed, or extend the speedbrakes.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A330/A340 FLEET PRO-NOR-SRP-01-60 P 8/12
FCOM 19 AUG 10
Applicable to: ALL
OP DES, V/S OR FPA MODE ENGAGED
In either case, the aircraft is no longer guided on the descent profile ‐ and altitude constraints
are disregarded. If NAV mode is engaged the ND displays a white circle on waypoints with an
altitude constraint. If NAV mode is disengaged, the circles are removed.
‐ The PFD still shows VDEV for reference purposes.
‐ The target altitude is always the FCU selected altitude (shown in blue).
On the ND, level-off symbol is blue (no constraint). If NAV mode is engaged and the speed
target managed, speed constraints are taken into account.
Vertical position may also be accessed by using the energy circle displayed on the navigation
display when HDG/TRK is engaged.
PROCEDURE
SET the FCU altitude as cleared by ATC, while also considering the applicable safe altitude.
If the next safe altitude is higher than the ATC-cleared altitude, check with ATC that this
constraint applies.
If confirmed, set the FCU altitude at the safe altitude until it is safe to fly at the cleared altitude.
MONITOR the speed target when the aircraft reaches the speed change symbol.
MONITOR the FMA ALT*, ALT, upon reaching the level symbol.
MONITOR the energy circle on the ND when in HDG/TRK mode.
The MCDU F-PLN page presents SPD/ALT constraint-matching predictions, which assume that
DES mode is reengaged immediately.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A330/A340 FLEET PRO-NOR-SRP-01-60 P 9/12
FCOM 19 AUG 10
CHECK the predictions before reengaging DES mode (in order to resume the descent profile).
Note: VDEV is available on the PFD even in HDG mode ; it is a valuable tool for monitoring
the descent as long as cross-track error (XTK) is less than five nautical miles
The aircraft decelerates for approach automatically only if it flies over the DECEL
pseudo waypoint with NAV mode engaged (or LOC*, LOC).
MONITORING THE NAVIGATION IN THE TERMINAL CONTROL AREA
Applicable to: ALL
If the MCDU “SYSTEM (AREA) (PROCEDURE) RNP IS XX.X” message is displayed, the crew
will verify the manually-entered RNP value in the REQUIRED field of the PROG page and clear or
modify it, if it is not in accordance with the RNP value specified in the area (Nav or approach chart).
TOO STEEP PATH
Applicable to: ALL
“TOO STEEP PATH AHEAD” appears on the MCDU scratchpad, when the system predicts this
situation, and TOO STEEP PATH is displayed on the F-PLN page.
When the aircraft is crossing the first waypoint of a TOO STEEP PATH, the system computes a
flyable descent profile (with an idle segment). The VDEV makes a jump because it is related to a new
profile.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A330/A340 FLEET PRO-NOR-SRP-01-60 P 10/12
FCOM 19 AUG 10
PROCEDURE :
�� When passing the first waypoint of the TOO STEEP PATH :
MONITOR VDEV and predictions at the next CSTR waypoint.
If required, EXTEND the speedbrakes before seeing the “EXTEND SPD BRK” message.
CONSIDER using a holding pattern, if necessary.
HOLDING PATTERN
Applicable to: ALL
A hold may be required during the descent and manually inserted.
PROCEDURE
PRESS the F-PLN key.
SELECT the lateral revision page.
SELECT the HOLD prompt.
CHECK the HOLDING data, and MODIFY it if necessary.
CHECK the temporary flight plan and INSERT the holding pattern in it.
Note: If the holding fix is close to the DECEL pseudo waypoint and the speed is managed,
manually activate the approach phase to change the managed target speed to approach
speed (VAPP). This will avoid having an inappropriate increase of speed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
NORMAL PROCEDURES
SYSTEMS RELATED PROCEDURES - FMS
A330/A340 FLEET PRO-NOR-SRP-01-60 P 11/12
FCOM 19 AUG 10
MANUAL TERMINATION
Applicable to: ALL
You should not use DES mode when entering a leg with manual termination. Manual termination,
which is defined as a track or a heading with no termination, is always part of a database procedure.
　
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