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modes but the FDs are no longer displayed.
AUTOMATIC DISENGAGEMENT
If one FD fails or one FMGEC is not valid, both PFDs display the remaining FD.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
A330/A340 FLEET DSC-22_30-20 P 4/6
FCOM 19 AUG 10
AUTOMATIC DISENGAGEMENT DUE TO SPEED PROTECTION
When the APs are not engaged and if the flight crew does not fly the FD bars, an automatic
disengagement of FDs and corresponding FMA modes will occur if the aircraft speed reaches
VMAX in climb with CLB or OP CLB mode engaged, or if the aircraft speed decreases to VLS in
descent with DES or OP DES mode engaged.
Refer to DSC-22_30-75-A Reversion - Speed Protections - Automatic Speed Mode Protection in
Climb.
AUTOMATIC FD REMOVAL
Applicable to: ALL
The FD pitch ‐ bar is removed when no vertical mode is engaged or when ROLL OUT mode is
engaged.
‐ The FD roll bar is removed when no lateral mode is engaged or when the RWY or ROLL OUT
mode is engaged.
‐ Both FDs are removed when the aircraft pitch exceeds 25 ° up or 13 ° down, or the bank angle
exceeds 45 °.
Note: If AP/FD are OFF, and FD2 then FD1 are engaged within 150 ms (one computation cycle),
a flip flop of the master FMGEC may occur.
As a result, no vertical mode engages and dashes are displayed on the FMA's 1st column,
1st line (A/THR mode).
Engaging the V/S mode manually reselects the correct FMGEC and restores the display.
FD WARNINGS
Applicable to: ALL
FD barWARNINGS CONDITIONS
Pitch FD bar (or FPV) flashes 10 s ‐ If the ALT* mode is lost further to an FCU altitude
reference change of more than 250 ft.
‐ When in APPR mode (G/S*, G/S, LAND, FINAL), FD
reverts to V/S mode (flight crew action or loss of vertical
approach mode).
‐ One AP or one FD is engaged while both AP/FD were
previously OFF.
Pitch FD bar (or FPV) flashes permanently Transmission of the GLIDE data is interrupted when in G/S,
G/S* or LAND modes above 100 ft RA.
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
A330/A340 FLEET DSC-22_30-20 P 5/6
FCOM 19 AUG 10
Continued from previous page
FD barWARNINGS CONDITIONS
Roll FD bar (or FPV) flashes 10 s When in APPR mode (LOC*, ‐ LOC, LAND, APP NAV), FD
reverts to HDG mode (flight crew action or loss of lateral
approach mode).
‐ One AP or one FD is engaged while both AP/FD were
previously OFF.
Roll FD bar (or FPV) flashes permanently Transmission of the LOC data is interrupted when in LOC,
LOC* or LAND modes above 15 ft RA.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
Intentionally left blank
A330/A340 FLEET DSC-22_30-20 P 6/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOPILOT (AP)
A330/A340 FLEET DSC-22_30-30 P 1/4
FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The AP:
‐ Stabilizes the aircraft around its center of gravity
‐ Acquires and tracks a flight path
‐ Flies the aircraft to an automatic landing or go-around.
The AP commands the:
‐ Position of the flight control surfaces for pitch, roll and yaw
‐ Nose wheel position.
AP ENGAGEMENT
Applicable to: ALL
The flight crew can engage AP1 or AP2 by pressing the corresponding pushbutton on the FCU if the
aircraft has been airborne for at least 5 s.
When one AP is engaged, the corresponding FCU pushbutton comes on and AP1 (or 2) is displayed
on the FMAs.
In dual BACK UP NAV, AP can be engaged in selected modes if the FG part is available.
AP can be engaged when:
‐ Aircraft speed is within VLS and VMAX
Aircraft pitch angle does not exceed 10 ‐ ° nose down or 22 ° nose up
‐ Bank angle is less than 40 °
‐ On ground, if the engines are not running. It disengages when one engine is started
‐ Two APs may be engaged at a time (AP1 active, AP2 in standby), when the localizer/glide-slope,
roll out or go-around mode is armed or engaged.
Only one AP can be engaged at a time in all other cases
‐ If one AP pb is set to ON with both FDs OFF, the AP engages in HDG V/S or TRK FPA mode,
depending upon which mode the flight crew has selected on the FCU
‐ If one AP pb is set to ON with at least one FD already ON, the AP engages in the current active
FD modes
AP engagement increases the break out force on the sidestick controllers and on the rudder pedals.
　
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