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The VDEV displayed on the primary flight display and the PROG page when the aircraft‐
is flying in the HM (hold pattern with manual termination) is the difference between the
aircraft's current altitude, and the altitude at which it should be, when it reaches the hold
exit fix in order to be positioned correctly on the descent path.
With IMM EXIT pressed (aircraft in the holding pattern)
The predictions and guidance assume that the aircraft is returning immediately to the hold fix.
Sequencing the hold fix, the aircraft exits the holding pattern and resumes its navigation.
The flight plan page displays “RESUME HOLD*” instead of “IMM EXIT*”.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-15 P 21/44
FCOM 19 AUG 10
HOLD EXIT PROCEDURE
Position (1) If “IMM EXIT” pressed, aircraft will exit at next fix overfly.
Position (2) If “IMM EXIT” pressed, aircraft will make an immediate turn to the fix where hold will
be exited.
If managed speed is active the computer sets the target speed to the applicable speed of
the current phase (for example, speed constraint, ECON speed, or speed limit).
The computer then bases its predictions on the assumption that the flight will continue on
the descent path, if the aircraft is in a descent.
If DES mode is engaged
the following applies :
The holding pattern is never included in the descent path computation.‐
The flight crew cannot enter altitude and speed constraints at the hold exit‐ fix (this is only
allowed at the hold entry fix).
The vertical guidance in the HM during the descent phase calls for a constant‐
-1 000 ft/min, but the computer considers altitude constraints that will take effect farther
down the flight path as it calculates vertical guidance and predictions. The system will not
allow the aircraft to descend below the next altitude constraint. If the aircraft reaches the
next altitude constraint, it will level off, and the altitude constraint mode will engage.
With RESUME HOLD pressed
If the flight crew presses the key next to “RESUME HOLD”, the aircraft remains in the holding
pattern, and the display again shows “IMM EXIT”.
After that, each time the aircraft flies over the holding fix, the system updates the predictions
for one more holding circuit.
HOLDING PATTERN ENTRIES
The FMGS offers three types of entry into holding patterns :
1. Direct entry
2. Teardrop entry
3. Parallel entry
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-15 P 22/44
FCOM 19 AUG 10
1. The direct entry
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
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FCOM 19 AUG 10
2. The teardrop entry
3. The parallel entry
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-15 P 24/44
FCOM 19 AUG 10
Note: If the leg the aircraft is flying toward the holding fix is on a “limit” between a teardrop
entry and a parallel entry, the FMGC may compute and display either of the two
entries. The pilot should keep this in mind and not assume that the FMGC is
malfunctioning.
If the flight plan leg toward the hold entry fix is on a course that is the reciprocal of
the inbound course of the holding pattern, the aircraft will fly a parallel entry.
PROCEDURE TO INSERT A HOLD
The HOLD prompt enables the crew to enter a holding pattern, with manual termination (HM), at
the revised waypoint or at the present position.
The flight crew accesses the HOLD page from a lateral revision at the present position (PPOS) or
at a waypoint.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A330/A340 FLEET DSC-22_20-30-10-15 P 25/44
FCOM 19 AUG 10
SELECT lateral revision at present position (PPOS), or at an applicable waypoint.
PRESS the HOLD prompt [3L].
CHECK and (if necessary) MODIFY the HOLD data
CHECK the temporary flight plan and INSERT it, if appropriate.
CLEAR the HOLD directly in the flight plan as can be done for a normal waypoint.
OFFSET
Applicable to: ,
GENERAL
The OFFSET prompt enables the crew to define a lateral offset to the left or right of the active
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(78)
