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FD engaged ‐ only (no AP), and
‐ OP DES or EXP DES �� or DES
engaged
‐ A/THR active (IDLE thrust)
IAS = VLS-2
(if speedbrakes are extended between
VLS-2 and VLS-19)
FD bars disappear.
If A/THR active, automatic
engagement of SPEED mode on
the A/THR.
Thrust increases to recover the
speed target.
FD engaged ‐ only (no AP), and
‐ OP CLB or EXP CLB �� or CLB
engaged
‐ A/THR active (CLIMB thrust)
IAS = VMAX+4
VMAX = VFE or VLE or VMO/MMO
FD bars disappear.
If A/THR active, automatic
engagement of SPEED mode on
the A/THR.
Thrust decreases to recover the
speed target.
SPEED PROTECTION DUE TO EXCESSIVE V/S
CONDITIONS EVENT CONSEQUENCE
Excessive V/S or FPA selected in climb IAS = VLS (or VLS-5, if
target = VLS)
‐ Excessive V/S or FPA selected in
descent, and
‐ Clean configuration
IAS = VMAX
‐ Excessive V/S or FPA < 0 selected in
descent, and
‐ Configuration other than clean
IAS = VMAX
The selected V/S (or FPA) target is temporarily
abandoned to maintain VLS in climb or VMAX in
descent.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
MODE REVERSIONS
A318/A319/A320/A321 FLEET DSC-22_30-75 P 16/18
FCOM 19 AUG 10
MODE REVERSIONS (SUMMARY)
Applicable to:
,
,
MSN,,,,
There are only 2 types of vertical mode reversions on aircraft equipped with global speed protection.
REVERSION DUE TO A CHANGE OF THE FCU SELECTED ALTITUDE
Vertical Mode Engaged FCU Altitude Selection Change Vertical Mode Switches to
CLB - OP CLB
EXP CLB �� Below aircraft altitude
DES - OP DES
EXP DES �� Above aircraft altitude
ALT* ACTIVE Any change
V/S on current V/S
REVERSION DUE TO THE LOSS OF NAV MODE (MANUAL OR AUTOMATIC)
CONDITIONS EVENT CONSEQUENCE
CLB engaged OP CLB engages
DES engaged Loss of NAV mode V/S engages
SPEED PROTECTION WHEN FD ORDERS ARE NOT FOLLOWED BY THE FLIGHT CREW (AP
NOT ENGAGED)
CONDITIONS EVENT CONSEQUENCE
FD engaged ‐ only (no AP), and
‐ OP DES or EXP DES �� or DES
engaged
‐ A/THR active (IDLE thrust)
IAS = VLS-2
(if speedbrakes are extended between
VLS-2 and VLS-19)
FD bars disappear.
If A/THR active, automatic
engagement of SPEED mode on
the A/THR.
Thrust increases to recover the
speed target.
‐ FD engaged only (no AP), and
‐ OP CLB or EXP CLB �� or CLB
engaged
‐ A/THR active (CLIMB thrust)
IAS = VMAX+4
VMAX = VFE or VLE or VMO/MMO
FD bars disappear.
If A/THR active, automatic
engagement of SPEED mode on
the A/THR.
Thrust decreases to recover the
speed target.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
MODE REVERSIONS
A318/A319/A320/A321 FLEET DSC-22_30-75 P 17/18
FCOM 19 AUG 10
SPEED PROTECTION DUE TO EXCESSIVE V/S
CONDITIONS EVENT CONSEQUENCE
Excessive V/S or FPA selected in climb IAS = VLS (or VLS-5, if
target = VLS)
Excessive ‐ V/S or FPA selected in
descent, and
‐ Clean configuration
IAS = VMAX
‐ Excessive V/S or FPA < 0 selected in
descent, and
‐ Configuration other than clean
IAS = VMAX
The selected V/S (or FPA) target is temporarily
abandoned to maintain VLS in climb or VMAX in
descent.
ENHANCED MODE REVERSION ALERTNESS
The following sequences, or mode reversions, are highlighted by a triple click:
‐ V/S selection in ALT*
‐ SPD selection in SRS
‐ CLB (or EXP CLB �� ) to OP CLB, upon lateral flight crew action while climbing toward a
constraint
‐ ALT* to V/S, upon ALT target change
‐ FD disengagement in OPEN modes
‐ Alerting FMA display when V/S-(FPA) target is not held
‐ CLB to OP CLB reversion, upon profile loss
‐ Automatic FD re-engagement in basic mode
‐ DES to V/S upon flight plan loss
‐ FINAL DES to V/S, upon NAV loss
‐ Reversion to V/S when selected ALT crosses the current altitude
‐ Automatic FD re-engagement in basic lateral mode
‐ NAV to HDG, upon NAV loss.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
MODE REVERSIONS
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-22_30-75 P 18/18
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD COMMON MODES - GENERAL
A318/A319/A320/A321 FLEET DSC-22_30-80-10 P 1/2
　
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