Touch Control Steering (Tcs); Autopilot Engagement/Disengagement - BOMBARDIER LEARJET 40 Pilot's Manual

Touch Control Steering (TCS)

TCS allows the pilot to manually fly and retrim the aircraft without dis-
engaging the autopilot. To use the TCS function, the pilot will press the
TCS button on the control wheel, maneuver the aircraft to the desired
condition, and release the TCS. Operation of the TCS button has no ef-
fect on flight director mode of operation. While the TCS button is held
depressed (AP engaged), a white TCS ENG annunciator appears in the
autopilot display area at the top of the PFDs.

Autopilot Engagement/Disengagement

Engagement of the autopilot is achieved via the AP push button on the
FGC. Each button has a vertical green bar that illuminates when en-
gaged. Engagement of the autopilot will cause the yaw damper to au-
tomatically engage. When engaged, the autopilot will couple to the
master flight director, and will follow the guidance commands from the
master FD. If no flight director is active, engagement of the autopilot
will cause the master FD to default to the basic PIT and ROL modes.
When engaged, the appropriate annunciation will be provided on both
PFDs, and the green bar on the AP push button will be illuminated.
Disengagement of the autopilot via the AP switch will cause the AP
annunciation to be removed from both PFDs and the green bar on the
AP push button will extinguish. Other actions that will cause autopilot
disengagement include:
(1) Control wheel master switch activation.
(2) Pilot initiated trim commands with control wheel trim
switch depressed.
(3) Yaw damper disengagement.
(4) AP switch on the FGC disengaged.
(5) Autopilot primary or secondary monitor trip.
For a normal disconnect, AP flashes red for 5 seconds, then is removed.
For a monitored disconnect, it flashes red for 5 seconds, then steady,
and the aural alert is continuous until the crew cancels it with the MSW.
PM-132A
Pilot's Manual
5-71