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AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-10 P 30/40
FCOM 19 AUG 10
• Constant delta ISA (equal to delta ISA at primary destination)
• Airway distance for a company route, otherwise direct distance manually entered by the pilot
in OTHER ALTN field (used only for preliminary predictions).
ENABLE ALTN
Applicable to: ,
This enables the pilot to initiate a diversion by entering the alternate flight plan just after the revision
waypoint (with a discontinuity).
The pilot may have to adjust the resulting flight plan (use “direct to”, or add or suppress waypoints),
depending on the circumstances.
TO ACTIVATE THE PRIMARY ALTN:
SELECT a LAT REV at the “TO" waypoint (or at another suitable waypoint)
PRESS the ENABLE ALTN key
INSERT the temporary F-PLN.
ENTER an appropriate waypoint in DIRECT TO and adjust the flight plan.
ADJUST the cost index on the PERF page and the defaulted cruise flight level (CRZ FL) on the
PROG page, as required.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-10 P 31/40
FCOM 19 AUG 10
When ENABLE ALT is pressed at ABE, a flight plan discontinuity is created from ABE down to
destination and the alternate route is linked to the active flight plan.
DIR KEY (DIRECT-TO-FUNCTION)
Applicable to: ,
GENERAL
The pilot uses the “Direct To” function to define a direct leg from the present position to any
waypoint on the active flight plan or to any waypoint.
The designated waypoint may be entered by its identifier (if it is stored in the database) or by a
latitude/longitude, place/bearing/distance, or a place-bearing/place-bearing.
Note: If the autopilot or flight director is in the heading/track or localizer mode, the “DIR TO”
function engages NAV mode.
Three functions are available through the DIR TO key :
th‐e DIR TO defines a direct leg from present position to a specified waypoint.
NAV mode engages simultaneously to the DIR TO selection.
When the pilot uses DIR TO, the present position (PPOS) becomes the “FROM” waypoint and
the active flight plan shows it as T-P (turn point).
the DIR TO/ABEAM function, defines the abeam waypoints along the direct leg. These‐
waypoints are the projection on the direct leg of the initial F-PLN waypoints located between the
aircraft position and the specified waypoint.
NAV mode engages simultaneously to the DIR TO/ABEAM selection.
the DIR TO/INTCPT function allows to define a specified RADIAL INBOUND or OUTBOUND‐
an inserted waypoint. The current aircraft track is used to compute the INTCPT point with the
specified radial.
NAV mode is armed simultaneously to the DIR TO/INTCPT selection.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-10 P 32/40
FCOM 19 AUG 10
The ND displays the DIR TO leg as a temporary flight plan leg between current aircraft position
and specified waypoint. In case of a DIR TO/INTCPT the leg is not displayed when the angle
between the current aircraft track and the intercept radial exceeds 160 °.
PROCEDURE FOR DIR TO WAYPOINT
CASE 1. THE "TO" WAYPOINT IS IN THE FLIGHT PLAN
Example : DIR TO FRZ
PRESS the DIR key on the MCDU.
PRESS the line select key next to “FRZ”
CASE 2. THE "TO" WAYPOINT DOES NOT BELONG TO THE FLIGHT PLAN
Example : Direct to ABC (ABC being an ident, LL or PBD or PB/PB)
PRESS the DIR key.
WRITE the waypoint identifier (e.g. ABC) in the scratchpad.
PRESS [1 L] to enter “ABC” in the “DIR TO” field.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-10 P 33/40
FCOM 19 AUG 10
Clear the discontinuity and the waypoints that are not included in the new flight plan.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-10 P 34/40
FCOM 19 AUG 10
PARTICULAR CASES FOR USE OF DIR TO
If the pilot is flying a manual leg (part of a SID or STAR), the flight plan page displays “F‐-PLN
DISCONTINUITY”, preceded by “MANUAL” (See below).
These legs are specific heading or track legs flown with no defined end waypoint.
　
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