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allows the cross-side flight director to become active.
Selecting the other AFCS (1 or 2) enables the second pair of FCCs, which would then allow the
autopilot to be reengaged.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−16
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
FLIGHT DIRECTORS (CONT'D)
FD Failure Indications
Figure 04−10−15
Flight Director Lateral Modes
There are eight flight director lateral modes (bold letters refer to the Flight Control Panel button
selections):
• Roll
• Heading Select (HDG)
• Half Bank (1/2 BANK)
• Navigation; FMS, VOR, LOC (NAV)
• Approach; FMS, VOR, LOC (APPR)
• Back Course (B/C)
• Takeoff
• Go-around
Lateral mode are armed or activated by pushbuttons on the flight control panel or on the thrust
levers. In general, deselecting the active lateral mode is accomplished by reselecting the active
FCP mode pushbutton, or by selecting another lateral mode.
Roll Mode
ROLL is the basic lateral operating mode, and is automatically selected when no other lateral
mode is active and the flight director is on. A green ROLL annunciation appears in the active
lateral field of the FMA when roll mode is active.
Roll mode generates commands to maintain a reference bank angle. If the roll attitude (bank
angle) is more than five degrees from level when roll mode is selected, the FCC generates
commands to maintain the bank angle. If the roll attitude is less than five degrees, the FCC
generates commands to maintain heading by rolling to zero bank (wings level).
The pilot flying may adjust the roll reference to a desired angle by pushing the FD SYNC button
and manually setting a bank angle up to 30 degrees. If the pilot selects a bank angle greater
than 30 degrees, but less than 45 degrees, the FD will generate commands to return to 30
degrees’ bank upon release of the FD SYNC button.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−17
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
FLIGHT DIRECTORS (CONT'D)
Roll mode is automatically cleared by selection of another lateral mode.
NOTE
Roll mode is automatically selected if the data required to fly the
active lateral mode becomes invalid.
Roll Mode
Figure 04−10−16
Heading Select Mode
Pushing the HDG button on the FCP alternately selects and clears heading select mode. A
green HDG annunciation appears in the active lateral field of the FMA when the mode is active.
Heading select mode generates commands to capture and maintain the selected heading
(heading bug). When heading mode is selected, the direction of turn will be the shortest turn to
the heading bug. The desired heading can be changed by turning the HDG knob on the FCP.
With heading mode active, the direction of turn will always be in the direction the heading bug is
moved. The heading bug may be synchronized to the aircraft’s current heading by pressing the
PUSH SYNC button in the center of the heading knob.
Heading mode is automatically cleared by selection or capture of another lateral mode, or by
pressing the HDG button again.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−18
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
FLIGHT DIRECTORS (CONT'D)
Heading Mode
Figure 04−10−17
Half Bank Mode
Pushing the 1/2 BANK button on the FCP alternately selects and clears half bank mode. When
the mode is active, a white 1/2 BNK annunciation appears to the left of the active/captured roll
mode on the PFDs. Half bank mode may be selected simultaneously with heading (HDG) or
FMS navigation mode.
When active, half bank mode (1/2 BANK) reduces the roll limit to half the normal value for the
active lateral mode.
Half bank mode is cleared automatically by activation of a noncompatible lateral mode, or can
also be cleared by pressing the 1/2 BANK button again.
Automatic Half Bank
Half bank is automatically selected if either flight director is selected and the airplane climbs
through a transition altitude of 31,600 feet MSL, or if the airplane is above this altitude when
the flight director is turned on. Half bank mode automatically clears when the airplane
descends below 31,600 feet MSL. Manual operation of half bank mode overrides the FCC
automatic transitions to or from half bank mode.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−19
REV 66, Feb 01/07
CL−604 Operating Manual
　
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