Pitch Trim and Cruise Sub-mode Logic
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Questions and Answers

What is the maximum rate at which the stabilizer moves when any pitch trim switch is activated?

0.4 degrees per second

In which sub-mode will the FCS be when Normal mode conditions are met along with the landing gear and flap handles being up?

Cruise sub-mode

How is pitch response designed in the system, especially at high altitude?

Conventional with additional damping

How is elevator movement augmented in the system to provide a more consistent response?

<p>Sensor feedback</p> Signup and view all the answers

What protection is provided in the system against exceeding the maximum operating speed?

<p>Limiting column authority in the nose down direction</p> Signup and view all the answers

What is the primary indication of Direct mode in the Flight Control System?

<p>FCC Direct Mode (caution) CAS message</p> Signup and view all the answers

In Direct mode, why is AOA limiting unavailable?

<p>Stall Protection Unavail (caution) CAS message</p> Signup and view all the answers

What happens to the amount of surface deflection per pilot input in Alternate or Direct mode when both the flap and gear handles are up?

<p>Less deflection when both handles are up</p> Signup and view all the answers

What is the maximum rate at which the stabilizer moves when any pitch trim switch is activated?

<p>0.4 degrees per second</p> Signup and view all the answers

When will the Flight Control System be in Backup mode?

<p>After all four FCC channels have failed</p> Signup and view all the answers

What is the function of the yaw damper in the given speed range (60-90 KCAS)?

<p>Between 60 KCAS and 90 KCAS, the yaw damper smoothly transitions from 0% to 100% effectiveness, using yaw rate feedback from the IRS sensors to control the rudder in combination with rudder pedal input.</p> Signup and view all the answers

What is the maximum rate of stabilizer movement commanded by the pitch trim switches?

<p>The pitch trim switches command the stabilizer to move at a maximum rate of 0.4 degrees per second in the direction commanded.</p> Signup and view all the answers

Under what conditions is the FCS in the Takeoff and Landing (TL) sub-mode?

<p>The FCS is in the Takeoff and Landing (TL) sub-mode when Normal mode conditions are satisfied, the aircraft is airborne (On-ground logic not satisfied), AOA limiting logic is not satisfied, the autopilot is not engaged, and either the landing gear handle is down or the flap handle is greater than 5°.</p> Signup and view all the answers

How does the pitch control system respond to column deflection at speeds below and above 135 KCAS?

<p>At speeds of approximately 135 KCAS and below, full column deflection results in full elevator deflection, except for a small flap bias. As speed increases above 135 KCAS, the amount of elevator deflection per column deflection decreases to prevent overly sensitive pitch response.</p> Signup and view all the answers

What is the purpose of the Maintenance mode conditions in the FCS?

<p>The question does not provide information about Maintenance mode conditions in the FCS.</p> Signup and view all the answers

What are the primary indications that the FCS is in Alternate mode?

<p>The primary indication of Alternate mode is an FCC Alternate Mode (caution) CAS message.</p> Signup and view all the answers

How does the amount of surface deflection per pilot input differ between when the flap or gear handle is not up versus when both handles are up in Alternate mode?

<p>In Alternate mode, the amount of surface deflection per pilot input (pitch, roll, and yaw) will be greatest when either the flap or gear handle is not up (assumes 250 KCAS), and less when both handles are up (assumes 340 KCAS).</p> Signup and view all the answers

How does the pitch control system function in Alternate mode?

<p>In Alternate mode, column deflection translates directly to elevator command.</p> Signup and view all the answers

How does the yaw control system function in Alternate mode if IRU #3 data is available?

<p>If IRU #3 data is available, a simplified yaw damper will damp dutch roll oscillations in Alternate mode.</p> Signup and view all the answers

What is the maximum rate of stabilizer movement when commanding pitch trim in Alternate mode?

<p>In Alternate mode, actuation of any pitch trim switch commands the stabilizer to move at its maximum rate of 0.4 degrees per second.</p> Signup and view all the answers

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