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MANUAL CANCELLATION OF OFFSET
There are two standard methods of cancelling an offset :
1. SELECT DIR TO a waypoint (the next waypoint, for example)
2. SELECT a Lateral Revision (LAT REV) at FROM WPT
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 26/40
FCOM 19 AUG 10
CLEAR the OFFSET field.
PRESS [6R] to activate the temporary flight plan (cancelling OFFSET).
ALTERNATE FUNCTION
Applicable to: ,
GENERAL
The ALTERNATE FUNCTION performs two actions :
It reviews and defines alternate airports and inserts them into the flight plan.‐
It allows a diversion to be activated through the ENABLE ALTN command.‐
REVIEW AND SELECTION OF ALTERNATE AIRPORT
Several alternate airfields may be stored in the database and assigned to a destination. When
the pilot selects a company route (CO RTE) (or a city pair), the computer strings the preferred
alternate into the active flight plan.
The pilot may review the alternate airports on the ALTN page, and if the one selected is not
suitable because of weather or fuel considerations, another alternate may be strung into the active
flight plan.
The pilot may define an additional alternate airport into the list, if necessary.
The ALTERNATE page shows the track and distance (airway or direct) between destination and
alternate, as well as fuel management data (EXTRA fuel, assuming the associated airfield is the
alternate airport). This data will help the pilot to change the preferred alternate, if necessary.
Access the ALTERNATE page through the ALTN prompt on LAT REV page at destination. The
alternate airfields are attached to the destination.
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 27/40
FCOM 19 AUG 10
ENTERING NEW ALTERNATE INTO THE F-PLN
If the preferred alternate is not suitable, proceed as follows :
SELECT F-PLN key on MCDU
SELECT LAT REV at destination.
SELECT ALTN [5L] key.
SELECT an AIRFIELD IDENTIFIER
INSERT the temporary flight plan
Note: If weather and destination airfield conditions allow it, you may select “NO ALTN”, fuel
predictions will be computed without alternate fuel.
SELECTION OF OTHER ALTERNATE
Fuel management information for flight to another alternate airfield may be obtained by selecting
the OTHER ALTN field.
SELECT LAT REV at DESTINATION.
SELECT ALTN [5L] key.
ENTER the airfield identifier in the brackets.
• If the airfield is not in the database, the NEW RUNWAY page automatically appears.
• If the airfield is in the database and there is a company route (CO RTE) to it, the ROUTE
SELECTION page automatically appears.
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 28/40
FCOM 19 AUG 10
SELECT the route, as appropriate, or RETURN to the ALTN page.
ENTER the distance into the brackets (if required). XTRA fuel and track (TRK) will appear.
SELECT the other alternate (OTHER ALTN) as a primary alternate, if convenient. (EXTRA fuel
and DIST revert to AIRWAY distance).
INSERT it, if you want to have it as a primary alternate.
Note: The pilot can always overwrite the “OTHER ALTN”. The new “OTHER ALTN” then‐
replaces the previous one, which is lost.
The pilot can select OTHER ALTN as a primary alternate (active flight plan), to‐
replace any alternate on the initial list.
If the pil‐ot selects the other alternate as a primary alternate, and overwrites the
OTHER ALTN field by entering a new airport, the first one will remain a primary
alternate and the system will memorize a second OTHER ALTN .
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 29/40
FCOM 19 AUG 10
The pilot may enter a distance in OTHER ALTN field. The system will compute the extra fuel,
and the track for this distance.
PREDICTED DATA FOR ALTERNATE
Data predictions are based on :
• Aircraft weight being equal to landing weight at the primary destination.
• Flight at flight 220, if the airway distance is less than 200 nm; otherwise, at flight level 310.
• Cost index 0
• Constant wind (as entered in the alternate field of the DES WIND page).
A330/A340 FLIGHT CREW
OPERATING MANUAL
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(70)
