SmartCockpit Fokker 50, Manual

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FLIGHT CONTROLS
The flight controls can be operated manually and automatically. From the flight deck, all
control surfaces are mechanically operated via rod-and-cable systems, except the electrically
operated aileron trim tab. To augment pitch attitude stability, an augment pitch attitude
stability system is installed. When the autopilot is engaged, ailerons, rudder, elevator, and
elevator-trim tab are controlled automatically.
Ailerons
The ailerons are operated manually from the captain’s and first officer’s control wheels. The
ailerons are equipped with spring tabs and balance tabs. The balance tab at the RH aileron
can be electrically operated as a trim tab. The aileron trim control panel is installed at the
rear of the pedestal.
Rudder
The rudder is operated manually from the captain’s and first officer’s pedals. A trim tab and a
balance tab, one above the other, are attached to the trailing edge of the rudder. The trim tab
can be operated mechanically from the trim control panel on the pedestal.
Elevator
The elevators are operated manually from the captain’s and first officer’s control column.
Pitch trim is obtained by an elevator trim tab at the RH elevator. The trim tab is operated by
trim wheels on both sides of the pedestal. A position indicator near each control wheel shows
the trim setting.
Augment pitch attitude stability
There are two pitch stability systems:
• Elevator Feel Control System.
• Longitudinal Stability Augmentation System.
Type I
An automatic Elevator Feel Control System (EFCS) is provided to balance the out-of-trim
forces caused by transients due to power and flap selections that would otherwise be felt at
the control column. The system operation is automatic and is active only during flight. Flap
and power lever positions are used as input variables. If the system fails, an alert will be
presented. The fault annunciation due to the power levers and flaps is inhibited during flight,
the alert will be presented on the ground approximately 15 seconds after landing. The
system can be switched OFF with the AUTO EL FEEL CTL pushbutton at the general
Fokker 50 - Landing Gear & Flaps
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