Section VII
Systems
VII-22-11
Vertical Speed/Pitch Wheel - Has two separate functions. If vertical
speed mode is active, this wheel is used to change the
vertical speed reference proportionally to the rotation
angle. If vertical speed mode is not active, movement of
this wheel deselects any vertical mode that may be active
(except glideslope capture) and selects pitch mode. In
pitch mode, rotation of the wheel changes the pitch
reference proportionally to the rotation angle.
YD/AP DISC disconnect bar - Provides a positive means of
disconnecting the autopilot and yaw damper by directly
removing power from the servos. Once the autopilot and
yaw damper are disconnected using this means, the bar
must be restored to its normal position before
reengagement is possible.
FD button (2) - Selects and removes the steering commands on the
PFD. At power up, the steering commands are displayed
on the PFD. Steering commands are selected on both
PFD's by engaging the autopilot, selection of go around
mode, automatic selection of overspeed mode, or by
manual selection of a vertical or lateral mode, when
steering commands are not displayed on either PFD and
the autopilot is not engaged. Coupling to a flight director
selects the steering commands on the coupled side, if
steering commands are displayed on either side, or if the
autopilot is engaged.
AP button - Engages or disengages the autopilot. Note that there is
also an AP disconnect switch mounted on each pilot
control wheel. Engagement of the autopilot automatically
engages the yaw damper.
Activating the pitch trim switch on either pilot or copilot
control wheels disconnects the autopilot and leaves the
yaw damper operational.
(Continued)
10 Sep 2006
