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setting. A green TO message is displayed in the active vertical field. This mode generates a pitch up command that is calculated
when the pilot enters V2 and VR values in the REFS 1/3 page or via the FMS TAKEOFF REF page. Loss of an
engine reduces the pitch up command appropriately. If V2 and VR are not entered when the TOGA switch is pushed, the
command bars are removed from the display.
GO-AROUND MODE (GA)
Go-around (GA) mode is selected by pushing one of throttle-mounted TOGA buttons while airborne. Selection of GA
mode turns on both flight directors, disengages the autopilot (but not the yaw damper), clears all other vertical modes (except
overspeed), and switches the flight guidance commands to a dual-independent configuration.
This mode is cleared by:
- Turning off the flight directors
- Engaging the autopilot
- Selecting another vertical mode
- Pressing AP/FD SYNC button
- Rotating the UP/DOWN wheel, which selects Pitch Hold
The GA Mode generates a 10° pitch up command.
This mode is annunciated by a green GA in the lateral and vertical capture field.
REV 1
AUTOMATIC FLIGHT CONTROL SYSTEM
Volume 2 Flight Crew Operating Manual May 06/2005
04-01-18 CSP 100-6 REV 2
FLIGHT DIRECTOR VERTICAL MODES (Cont)
FLIGHT LEVEL CHANGE (FLC) MODE
In flight level change mode (FLC), the flight director provides commands to acquire and track an IAS or Mach reference
airspeed. The IAS/MACH reference values may be adjusted by turning the speed knob on the FGP.
The IAS/MACH reference values, may be adjusted by the pilot by turning the Speed knob on FGP. These values can also
be synchronized by the FGC or by the FMS when in VNAV mode and RESUME VNAV PLAN SPEED is selected on the
FMS PERF MENU page.
FLC mode may be selected in the following ways:
- Pressing the FLC button on the FGP, except FLC is inhibited from being selected while in the Vertical Approach
Capture / Track Mode
- Using FMS, if VNAV has been selected
FLC mode may be deselected as follows:
- Turning the FD off while the AP is disengaged
- Another vertical mode is selected or automatically captured
- If VNAV has been selected, and FMS selects another active vertical mode
- Pressing FLC button on the FGP
- Changing the coupled side
When the FLC mode is first selected, the flight director synchronizes the IAS or Mach airspeed reference to the current
speed.
FLC is displayed in green letters in the vertical capture field.
OVERSPEED MODE
If any significant overspeed occurs when the aircraft is at or above the overspeed transition altitude and airspeed is greater
than 0.845 MI, or is below the overspeed transition altitude and airspeed is greater than 10 kt above VMO. Overspeed Mode
is automatically engaged by the FGC unless altitude hold or altitude preselect are active. The FGC generates the commands
to reduce the airspeed to below VMO/ MMO. While in overspeed mode, the selection or activation of a vertical mode other
than altitude hold or ALTS capture or track is inhibited. Activation of overspeed mode causes the FGC to automatically
turn on the flight directors and inhibit the FD from being turned off until another mode is manually or automatically selected.
Flight Guidance can not be deselected in FLC Overspeed. While in FLC Overspeed, the Altitude Preselector will not inhibit
commands to climb or descend as required to capture the reference airspeed.
When Flight Level Change Overspeed is detected, a FLC OSPD flashing in amber in the top (capture) field on the PFD. If
VNAV is active in the vertical field, a VFLC OSPD flashing amber CAS is depicted on the PFD.
VERTICAL NAVIGATION MODE
VNAV mode allows the FMS to execute its vertical flight plan by issuing various commands to the FCS. Therefore, VNAV
is not a FCS mode, but enables the FMS to command various FCS vertical modes and to provide references associated with
those modes. VNAV is selected only when onside FMS is the active NAV source on the PFD. VNAV mode is selected by
pressing the VNAV button on FGP. VNAV is inhibited when the FCS is in the vertical approach capture/track, if ILS is the
vertical source, or when Overspeed mode is active.
VNAV mode is deselected as follows:
- Turning off the FD while the AP is disengaged
- Automatic capture/track of vertical approach mode, when ILS is the vertical source
- Selecting TO or GA mode
- Changing the source of the active VNAV data
- By pressing the VNAV mode button on the FGP
EV 2
AUTOMATIC FLIGHT CONTROL SYSTEM
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6 04-01-19
FLIGHT DIRECTOR VERTICAL MODES (Cont)
VERTICAL SPEED MODE (VS)
When the VS mode is selected, the Flight Guidance Computer (FGC) commands the aircraft to climb or descend with a
　
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