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‐ Speed and altitude constraints are disregarded (but speed limit is retained).
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 2/18
FCOM 19 AUG 10
INTERACTION BETWEEN LATERAL MODES,
VERTICAL MODES, AND MANAGED SPEED PROFILE
Applicable to:
�� When NAV mode is engaged:
The FMGS guides the aircraft along the flight plan and considers the constraints attached to the
F-PLN waypoints. As a result:
Managed ‐ CLB and DES modes are available
‐ The managed speed profile includes: V2 - SPD CSTR (if applicable) - SPD LIM - ECON CLB
SPD/MACH - ECON CRZ MACH - ECON DES (MANAGED SPD) - SPD/MACH - SPD CSTR
- SPD LIM - HOLD SPD - VAPP/GS MIN.
It is valid for all vertical modes, except EXPEDITE �� .
�� When NAV mode is not engaged:
The FMGS considers that the flight plan is not followed, and ignores all speed and altitude
constraints linked to the F-PLN waypoints. As a result:
‐ The managed vertical CLB and DES modes are not available
‐ The managed SPD profile disregards the speed constraints and includes: V2 - SPD LIM -
ECON CLB - ECON CRZ - ECON DES (MANAGED SPD) - SPD LIM - VAPP/GS MIN target.
As a consequence, when NAV mode disengages (manual or automatic):
‐ CLB mode, when engaged, reverts to OPEN CLB
‐ DES mode, when engaged, reverts to V/S mode on current value
‐ Speed and altitude constraints are disregarded (but speed limit is retained).
INTERACTION BETWEEN LATERAL MODES,
VERTICAL MODES, AND MANAGED SPEED PROFILE
Applicable to:
,
,
MSN,,,,
�� When NAV mode is engaged:
The FMGS guides the aircraft along the flight plan and considers the constraints attached to the
F-PLN waypoints. As a result:
‐ Managed CLB and DES modes are available
‐ The managed speed profile includes: V2 - SPD CSTR (if applicable) - SPD LIM - ECON CLB
SPD/MACH - ECON CRZ MACH - ECON DES (MANAGED SPD) - SPD/MACH - SPD CSTR
- SPD LIM - HOLD SPD - VAPP/GS MIN.
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 3/18
FCOM 19 AUG 10
It is valid for all vertical modes, except EXPEDITE �� .
�� When NAV mode is not engaged:
The FMGS considers that the flight plan is not followed, and ignores all speed and altitude
constraints linked to the F-PLN waypoints. As a result:
The managed vertical CLB and ‐ DES modes are not available
‐ The managed SPD profile disregards the speed constraints and includes: V2 - SPD LIM -
ECON CLB - ECON CRZ - ECON DES (MANAGED SPD) - SPD LIM - VAPP/GS MIN target.
As a consequence, when NAV mode disengages (manual or automatic):
‐ CLB mode, when engaged, reverts to OPEN CLB. The lateral mode is boxed white for 10 s. The
vertical mode is boxed white.
If within 5 s, the disengagement of the NAV mode is not confirmed by one of the following flight
crew actions:
• FCU altitude change
• Level-off
• Selection of the V/S mode
then, a triple click aural warning sounds. In addition, a white box flashes around the vertical mode
for additional 10 s.
‐ DES mode, when engaged, reverts to V/S mode on current value.
If within 5 s, the disengagement of the NAV mode is not confirmed by one of the following flight
crew actions:
• FCU altitude change
• Level-off
• Selection of the V/S mode
then, a triple click aural warning sounds. In addition, a white box flashes around the vertical mode
for additional 10 s.
‐ Speed and altitude constraints are disregarded (but speed limit is retained).
MODE REVERSION DUE TO FCU ALTITUDE CHANGE
Applicable to:
When an OPEN mode is engaged, the aircraft climbs or descends towards the altitude set on the
FCU. If the flight crew sets the FCU altitude to a target not compatible with the active open mode, a
mode reversion occurs and V/S (or FPA) engages on current V/S (or FPA).
This reversion applies to CLB, OP CLB, DES, OP DES, EXP DES �� , EXP CLB �� .
Example: Reversion from OP CLB to V/S:
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 4/18
FCOM 19 AUG 10
With ALT* engaged, the target altitude is changed by any value greater than 250 ft, V/S (or FPA)
engages on currents V/S (or FPA). Refer to DSC-22_30-75 Mode Reversions (Summary).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
MODE REVERSIONS
　
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