CONTROL WHEEL

PITCH TRIM SWITCH (SPRING-LOADED TO NEUTRAL)

• Trims the airplane when the autopilot is not engaged.

• If only half of the switch is actuated for more than 7 seconds, the switch will be automatically deactivated.

• Manual pilot trim commands are limited to 3 seconds.

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CONTROL WHEEL COMMUNICATIONS SWITCH

• PTT (momentary): allows VHF transmissions, as well as voice communications to passengers.

• HOT: allows communication between crewmembers and ramp station.

• OFF: allows only audio reception.

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AP/TRIM DISCONNECT BUTTON

• Trim

  • Press and Hold the AP/TRIM DISC Button

    • It disconnects the autopilot and stops any active trim command.

  • Release the AP/TRIM DISC Button

    • Re-activates the trim commands.

• Autopilot

  • Normal means of disengaging the autopilot.

  • Pressing once disengages the autopilot.

  • Second press cancels the autopilot aural alarm and FMA AP warning.

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TOUCH CONTROL STEERING BUTTON (TCS)

• Press and Hold the TCS:

  • Synchronizes the Flight Director with the current airplane attitude.

  • Momentarily overrides the autopilot if it is engaged.

• Release the TCCCS:

  • The Flight Director returns to the lateral and vertical selection when the TCS was pressed.

  • With Roll/VS/FPA modes the FD re-syncs the aircraft to the current attitude when TCS is released.

  • Autopilot resumes airplane control if the autopilot is engaged.

STEERING DISENGAGE SWITCH

• Located on the back of the control yoke.

• Disengages the nosewheel steering system.

FREE WHEEL STEERING MODE

• Used for towing or when the normal steering system fails.

• Steering system can be disengaged reverting to free wheel by:

  • Steering disengage switch on yoke.

  • External steering disengage switch located on the external power connection access.

• Steering can be carried out by use of rudder, differential brake and/or asymmetrical thrust.

TOWING

• Safe to tow when the following indications are visible:

  • Green light on the nose gear.

  • Parking brake ON light extinguished.

  • STEER OFF EICAS displayed.

• Green towing light on nosewheel illuminates when:

  • Steering is disengaged

  • Parking brake is not set

  • Toe brakes are not applied

• Red guarded steering switch on the forward ramp panel disengages the nosewheel steering.

CHRONOMETER BUTTON

• Starts/stops/resets the chronometer displayed on the PFD.

• Independent information/function for each control wheel.