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A318/A319/A320/A321 FLEET DSC-22_30-70-30 P 1/4
FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The OPEN CLB mode is a selected mode. It uses the AP/FD pitch mode to maintain a SPD/MACH
(selected or managed) while the autothrust (if active) maintains maximum climb thrust.
ENGAGEMENT CONDITIONS
Applicable to:
The OPEN CLB mode can only be engaged, if all of the following conditions are met:
‐ The aircraft is in flight for more than 5 s
‐ The LAND mode is not engaged
The FCU selected altitude is higher than ‐ the aircraft’s present altitude.
The OPEN CLB mode is engaged, if one of the following conditions occurs:
‐ The flight crew pulls out the ALT knob
‐ The flight crew pulls out the SPD/MACH knob, when TOGA mode or EXPED CLB �� is engaged
‐ Acceleration altitude is reached, with CLB armed, and NAV mode not engaged
‐ Guidance reverts to ensure speed protection
‐ NAV mode is lost (or disengaged), when previously in CLB mode (Refer to DSC-22_30-75
General).
Note: When OPEN CLB is engaged:
‐ The FMA displays "OP CLB"
‐ The managed LVL/CH dot on the FCU goes out.
ENGAGEMENT CONDITIONS
Applicable to:
,
,
MSN,,,,
The OPEN CLB mode can only be engaged, if all of the following conditions are met:
‐ The aircraft is in flight for more than 5 s
‐ The LAND mode is not engaged
‐ The FCU selected altitude is higher than the aircraft’s present altitude.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - OPEN CLIMB MODE
A318/A319/A320/A321 FLEET DSC-22_30-70-30 P 2/4
FCOM 19 AUG 10
The OPEN CLB mode is engaged, if one of the following conditions occurs:
‐ The flight crew pulls out the ALT knob
‐ The flight crew pulls out the SPD/MACH knob, when TOGA mode or EXPED CLB �� is engaged
‐ Acceleration altitude is reached, with CLB armed, and NAV mode not engaged
‐ Guidance reverts to ensure speed protection
‐ NAV mode is lost (or disengaged), when previously in CLB mode. Reversion to OPEN CLB is
accompanied by a triple click aural warning (Refer to DSC-22_30-75 General).
Note: When OPEN CLB is engaged:
‐ The FMA displays "OP CLB"
‐ The managed LVL/CH dot on the FCU goes out.
DISENGAGEMENT CONDITIONS
Applicable to: ALL
The OPEN CLB mode is disengaged by one of the following conditions:
‐ Engagement of any other vertical mode
‐ Reversion to V/S mode (Refer to DSC-22_30-75 General)
‐ Selection of a lower altitude than the current aircraft altitude. V/S (FPA) engages on the current
V/S (FPA).
GUIDANCE
Applicable to: ALL
When OPEN CLB is engaged, the target speed/Mach is maintained by adjusting the pitch with the
elevator, whereas thrust is maintained either by the A/THR, or manually by the flight crew. Speed
target may either be selected or managed.
The OPEN CLB mode disregards all altitude constraints up to the FCU selected altitude.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - OPEN CLIMB MODE
A318/A319/A320/A321 FLEET DSC-22_30-70-30 P 3/4
FCOM 19 AUG 10
OPEN CLB MODES, MANAGED SPEED
Note: If the change is less than 1 200 ft in OPEN CLB mode, the aircraft responds with a rate
of climb of 1 000 ft/min.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AP/FD VERTICAL MODES - OPEN CLIMB MODE
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-22_30-70-30 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 - DESCENT MODE
A318/A319/A320/A321 FLEET DSC-22_30-70-50 P 1/22
FCOM 19 AUG 10
GENERAL
Applicable to:
The DES mode guides the aircraft along the descent path computed by the FMGS. The system
computes this flight path backwards from the deceleration point up to the top of descent (T/D), with
respect to the speed and altitude constraints at the deceleration point, the guidance begins the
deceleration to VAPP, to be reached at 1 000 ft above touchdown on the final descent path.
Internally, the computer divides the descent path into various segments, depending on the relative
positions of the constraints. It starts at top of descent (T/D) by setting up an “idle” segment that
takes the aircraft down to the first constraint, and follows this with “geometric” segments between
constraints.
The descent profile takes into account wind data and data from the lateral and vertical flight plans,
　
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