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from the CRZ FL. This feature improves fuel efficiency and passenger comfort and minimizes the
changes in thrust.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - ALTITUDE HOLD MODE
A318/A319/A320/A321 FLEET DSC-22_30-70-70 P 3/4
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - ALTITUDE HOLD MODE
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-22_30-70-70 P 4/4
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - VERTICAL SPEED
MODE - FLIGHT PATH ANGLE MODE (V/S - FPA)
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FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The V/S - FPA mode is a selected mode. It acquires and holds the vertical speed or the flight path
angle displayed in the V/S - FPA window of the FCU.
The HDG V/S -TRK FPA pb on the FCU allows the flight crew to select either type of reference to be
used for guidance and for display on the PFD.
ENGAGEMENT CONDITIONS
Applicable to: ALL
The flight crew can engage the mode manually as follows:
Pull out the V/S ‐ or FPA knob (at least 5 s after lift-off) or push it in for an immediate level off
(V/S=0)
‐ Engage the AP and/or FD if AP and FD are not engaged (basic mode of AP/FD engagement)
‐ Select a different altitude (more than 250 ft from present altitude) when in ALT* mode
‐ Select a higher altitude than present altitude when in DES, OP DES modes or EXP DES ��
mode
Select a lower altitude than present altitude ‐ when in CLB, OP CLB modes or EXP CLB �� mode.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - VERTICAL SPEED
MODE - FLIGHT PATH ANGLE MODE (V/S - FPA)
A318/A319/A320/A321 FLEET DSC-22_30-70-80 P 2/2
FCOM 19 AUG 10
The mode engages automatically:
‐ 5 s after lift-off, if no other vertical mode is engaged
‐ Upon loss of G/S* or G/S mode
‐ Upon loss of FINAL mode
‐ Upon loss of LOC* or LOC mode
‐ Upon loss of NAV mode when DES mode is engaged
‐ Upon loss of vertical flight path in DES mode.
DISENGAGEMENT CONDITIONS
Applicable to:
,
,
MSN,,,,
The flight crew can disengage the V/S mode manually by:
‐ Pulling or pushing the Altitude knob, or
‐ Pushing the EXPED pb �� , or
‐ Initiating a go-around.
It disengages automatically:
‐ When the aircraft reaches the FCU altitude, or
‐ Upon G/S* engagement.
GUIDANCE
Applicable to:
,
,
MSN,,,,
The FMGC pitch mode guides the aircraft to the target V/S or FPA. The corresponding A/THR mode
is SPEED or MACH. The FMA displays V/S (FPA).
The V/S (FPA) guidance has priority over the speed guidance. If the selected target V/S or FPA is
too high (relative to the current thrust condition and speed), the FMGC will steer the aircraft to the
target V/S or FPA, but the aircraft will also accelerate or decelerate.
When the speed reaches its authorized limit, V/S or FPA automatically decreases to maintain the
minimum (or maximum) speed limit.
Note: If the flight crew sets V/S = 0 or pushes the V/S or FPA knob to level off, it automatically
sets V/S or FPA target to zero and the aircraft levels off and maintains its altitude.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - EXPEDITE
A318/A319/A320/A321 FLEET DSC-22_30-70-90 P 1/4
FCOM 19 AUG 10
GENERAL
Applicable to:
Expedite mode is an OPEN mode used in climb or descent to reach the desired altitude with the
maximum vertical gradient.
ENGAGEMENT CONDITIONS
Applicable to:
The flight crew can engage EXPEDITE if:
The aircraft has ‐ been in flight for more than 5 s
‐ Managed speed is available.
The flight crew engages EXPEDITE manually by pushing the EXPED pb on the FCU:
‐ If the FCU selected altitude is higher than present altitude, EXP CLB mode engages
‐ If the FCU selected altitude is lower than present altitude, EXP DES mode engages.
DISENGAGEMENT CONDITIONS
Applicable to:
The flight crew can disengage EXPEDITE manually by:
‐ Pulling out the V/S or FPA knob to engage the V/S or FPA mode
‐ Pulling out the ALT knob to engage OP CLB or OP DES
‐ Pulling out the SPD/MACH knob to activate the selected speed target and engage OP CLB or OP
DES
‐ Pushing in the ALT knob to engage the CLB or DES mode, provided that the engagement
　
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