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and antiicing
capability in icing conditions.
FLIGHT CONTROLS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
10−10−52
STALL PROTECTION COMPONENTS (CONT'D)
Mach Transducer (On airplanes 9002 thru 9158)
The mach transducer control is installed on the right side of the flight compartment, below the
copilot’s side console. It is connected to the pitotstatic
system through a selector/isolator switch.
The mach transducer receives electrical input and pressure through connectors and supplies
secondary mach information to the channels of the Stall Protection Computer (SPC). The ADCs
supply primary mach data to the channels of the (SPC).
Mach Transducer Selector
Normal operation is selection
in the pitot/static position.
The mach transducer is operated in the pitotstatic
position and is used to cross check for errors
from the micro air data computer system. This is accomplished by providing dissimilar source for
mach number, airspeed and altitude inputs.
Stick Shaker Actuator
A stick shaker (mechanical vibratory device) actuator is located on each control column and
provides tactile sensing, simulating airplane buffeting.
The stick shakers consist of a high speed motor and the actuators are controlled from the SPC
channels.
FLIGHT CONTROLS
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
10−10−53
STALL PROTECTION COMPONENTS (CONT'D)
Stall Pusher
If the angle of attack increases to a point where the airplane’s stall margin is too small, the SPC
will command a push of both control wheels. This is accomplished using a motor assembly which
will drive the forward left elevator quadrant. The right control wheel will receive its input to push
through the coupled automatic pitch disconnect mechanism.
The pitch disconnect mechanism has a function to engage a solenoid piston to prevent elevator
split during push.
GF1010_064
The pitch disconnect solenoid is controlled by the SPC and when operated, prevents the automatic
pitch disconnect mechanism from activating when push is commanded by the SPC.
When the AOA approaches pusher firing angle (1½ degrees before push occurs) the pitch
disconnect locking mechanism is activated. When the push is cancelled, the solenoid for the pitch
disconnect locking mechanism is deactivated.
FLIGHT CONTROLS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
10−10−54
STALL PROTECTION COMPONENTS (CONT'D)
Stall Protection Disconnect Buttons
The stall protection disconnect buttons are located on the pilot and copilot
control column. These
switches also provide a disconnect command to the autopilot and pitch trim functions.
NOTE
A “STALL PROTECT FAIL” caution message will be displayed if the
disconnect button is held for longer than 12 seconds.
This stick pusher may be stopped by pressing and holding the autopilot/stick pusher disconnect
(AP/SP DISC) switch. This will remove power to the actuator as long as either switch is depressed.
The stick pusher is capable of operating immediately once the autopilot/stck pusher disconnect
switch is released, and a stall push is requested by the computer.
NOTE
The remaining stall warning functions are available with the disconnect button held. All other SPS
functions operate normally.
Effectivity:
· Airplanes 9127 to 9999 not incorporating Service Bulletin:
· SB 700−1A11−27−004, Stall Protection System − Disable Stick Pusher Cancel Function
from Autopilot Master Disconnect Switch for JAA aircraft.
The stick pusher may be stopped by pressing and holding the autopilot/stick pusher disconnect
(AP/SP DISC) switch.
The SPC will remove power to the actuator as long as either switch is activated and the push will
be cancelled. The stck pusher is capable of operating immediately once the AP/SP DISC switch
is released and a stall push is requested by the computer.
The remaining stall warning functions are available with the disconnect button held. Only the
push function is disabled with either switch held. All other SPS functions operate normally.
FLIGHT CONTROLS
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
10−10−55
STALL PROTECTION COMPONENTS (CONT'D)
Stall Pusher On/Off Switches
The stall pusher “ON/OFF” switches are used for long term disabling of the pusher system. The
switches are located on the pilot and copilot side panels.
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