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GENERAL
A330/A340 FLEET DSC-22_30-10 P 6/6
FCOM 19 AUG 10
INTERACTION BETWEEN AP/FD AND A/THR MODES
Applicable to: ALL
The AP and FD pitch modes can control a target SPD/MACH or a vertical trajectory, and the A/THR
mode can control a fixed thrust or a target SPD/MACH. However, the AP/FD and the A/THR cannot
both control a target SPD/MACH simultaneously.
Therefore, the AP/FD pitch modes and A/THR mode are coordinated as follows:
If an AP/FD pitch mode controls a vertical trajectory, ‐ the A/THR mode controls the target
SPD/MACH.
‐ If an AP/FD pitch mode controls a target SPD or MACH, the A/THR mode controls the thrust.
‐ If no AP/FD pitch mode is engaged, the A/THR mode reverts to controlling the SPD/MACH mode.
In other words, the selection of an AP/FD pitch mode determines the associated A/THR mode.
AP/FD pitch modes A/THR modes
V/S - FPA
DES (geometric path)
ALT*, ALT, ALT CST*, ALT CST
G/S*, G/S
FINAL
AP/FD OFF
SPD/MACH MODE
OP CLB/OP DES
CLB/DES (idle path)
SRS
THR (CLB, IDLE) MODE
FLARE RETARD (IDLE)
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
A330/A340 FLEET DSC-22_30-20 P 1/6
FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The Flight Director (FD) displays guidance commands from the Flight Management Guidance and
Envelope Computer (FMGEC) on the Primary Flight Display (PFD).
The flight crew may fly the aircraft manually, following FMGEC guidance commands, or crosscheck
the FMGEC orders when the autopilot is engaged.
In normal operations, FD1 displays FMGEC1 orders on PFD1 and FD2 displays FMGEC2 orders on
PFD2.
The FDs use their respective onside FMGECs.
On the PFD:
1. The FD pitch and roll crossbars show pitch and roll demands.
2. Below 30 ft during landing and takeoff, when a localizer is available, the vertical bar is replaced by
a yaw bar that gives lateral orders.
3. The Flight Path Director (FPD) symbol relates to the Flight Path Vector (FPV).
The HDG V/S – TRK FPA pb on the FCU permits the flight crew to select either type of reference and
display.
The FD pb on the Electronic Flight Instrument System (EFIS) control panel allows the FD bars to be
displayed or removed.
FD BARS (HDG V/S SELECTED ON THE FCU)
The pitch bar is displayed if a vertical mode is engaged. It ‐ gives pitch orders for the vertical
guidance
‐ The roll bar is displayed if a lateral mode is engaged. It gives roll orders for lateral guidance.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
A330/A340 FLEET DSC-22_30-20 P 2/6
FCOM 19 AUG 10
FLIGHT PATH DIRECTOR (TRK FPA SELECTED ON THE FCU)
The display is an alternate way of transmitting flight director commands.
‐ The Flight Path Vector (FPV) symbol illustrates the actual track and flight path angle being flown
‐ The Flight Path Director (FPD) symbol shows the flight crew how to intercept and fly the vertical
and lateral flight trajectory. When the flight crew superimposes the FPV and the FPD symbols,
the aircraft flies the commanded trajectory.
FLIGHT DIRECTOR (FD) ENGAGEMENT
Applicable to: ALL
The FDs are automatically engaged whenever the FMGEC powers up.
GROUND ENGAGEMENT
‐ The "1FD2" symbol appears on both PFDs
‐ No FD bars appear on the PFDs. The PFD displays FD orders when a mode is active on the
corresponding axis
‐ The FCU windows display dashes.
MANUAL FLIGHT ENGAGEMENT
Provided no lateral or vertical mode is displayed on the FMAs (AP/FD OFF), the two FD engage in
the HDG V/S or TRK FPA modes (basic modes) when FD pb are pressed.
AUTOMATIC FLIGHT ENGAGEMENT
FD bars are automatically restored in SRS/GA TRK modes at go-around engagement. If FPV/FPD
was previously selected, it reverts to FD bars.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
FLIGHT DIRECTOR
A330/A340 FLEET DSC-22_30-20 P 3/6
FCOM 19 AUG 10
FLIGHT DIRECTOR (FD) DISENGAGEMENT
Applicable to: ALL
The flight crew may disengage one or two FDs manually, or FDs may disengage automatically if
there is a failure.
MANUAL DISENGAGEMENT
One FD OFF:
‐ The FD bars no longer appear on the associated PFD.
‐ The corresponding FD is disengaged.
Both FDs OFF:
‐ The FD bars disappear from both PFDs
‐ If no AP was engaged, lateral and vertical modes disengage. The A/THR, if active, automatically
reverts to (or remains in) SPEED/MACH mode
‐ If one AP was engaged when FDs are switched OFF, this AP remains engaged in the active
　
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