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The flight plan has a discontinuity if any two waypoints do not have a leg defined between them.
The computer assumes that the aircraft will fly a direct leg between the two waypoints that define the
discontinuity.
Note: 1. When the aircraft enters a flight plan discontinuity, the NAV mode automatically switches
to the HDG (TRK) mode.
2. In HDG/TRK mode, a waypoint is sequenced when it passes behind the aircraft, and
the aircraft is less than 7 nm from it, and also when the difference between the track of
the aircraft and the track of the leg is less than 90 ° . The same conditions apply in NAV
mode, except that no distance to the waypoint is taken into account.
The FMGES automatically strings additional types of legs when departure or arrival procedures
(SID-STAR-TRANS) are defined.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-05 P 3/16
FCOM 19 AUG 10
Some of these legs are specific legs, such as:
DME arc leg‐
Holdin‐g pattern to a fix or reverse turn
Course‐-to-fix leg
Heading leg‐
MANUAL leg.‐
The flight crew cannot create these types of legs: They are part of the stored departure/arrival
procedures they have selected.
The flight crew can create only direct legs between manually defined geographic points (navaids,
airports, waypoints).
Note: The departure and arrival procedures are defined in the database to minimize the amount
of memory required.
They are divided as follows:
DEPARTURE = SID + EN ROUTE TRANSITION‐
ARRIVAL = APPR VIA + STAR + EN ROUTE TRANSITION‐
The SID is the central common part of the departure procedure, as the STAR is of the
arrival procedure. En route transitions (TRANS) are the various possible trajectories defined
between the last point of the SID and the first en route waypoints and between the last
en route waypoint and the first fix of the STAR. "APPR VIAs" are the possible trajectories
defined between the last point of the STAR and the first point of the approach.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-05 P 4/16
FCOM 19 AUG 10
GENERAL
Applicable to: ,
To insert the lateral flight plan, the flight crew can use either a company route number or an ICAO
four-letter city pair. The lateral flight plan includes the following elements:
Departure‐
• Takeoff runway
• SID
• En route transition.
En route‐
• En route waypoints and airways.
Arrival‐
• En route transition
• STARs/VIAs
• Landing runway with selected approach
• Missed approach.
Alternate flight plan.‐
These elements are defined by waypoints and legs between the waypoints.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-05 P 5/16
FCOM 19 AUG 10
The FMGEC strings the legs in sequence automatically.
The flight plan has a discontinuity if any two waypoints do not have a leg defined between them.
The computer assumes that the aircraft will fly a direct leg between the two waypoints that define the
discontinuity.
Note: 1. When the aircraft enters a flight plan discontinuity, the NAV mode automatically switches
to the HDG (TRK) mode.
2. In HDG/TRK mode, a waypoint is sequenced when it passes behind the aircraft, and
the aircraft is less than 7 nm from it, and also when the difference between the track of
the aircraft and the track of the leg is less than 90 ° . The same conditions apply in NAV
mode, except that no distance to the waypoint is taken into account.
The FMGES automatically strings additional types of legs when departure or arrival procedures
(SID-STAR-TRANS) are defined.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-05 P 6/16
FCOM 19 AUG 10
Some of these legs are specific legs, such as:
DME arc leg‐
Holding pattern to a fix or reverse turn‐
Course‐-to-fix leg
Radius‐-to-fix leg
Heading leg‐
MANUAL le‐g.
The flight crew cannot create these types of legs: They are part of the stored departure/arrival
procedures they have selected.
The flight crew can create only direct legs between manually defined geographic points (navaids,
airports, waypoints).
Note: The departure and arrival procedures are defined in the database to minimize the amount
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(61)
