TM 55-1520-240-23-9
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ADVANCED FLIGHT CONTROL SYSTEM
(Continued)
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Integrated Lower Control Actuators
Four integrated lower control actuators (ILCAs)
controlling pitch, roll, and yaw, and thrust are in the
flight controls closets. Each ILCA has two sections —
a lower boost actuator and a dual extensible link. The
lower boost actuator is controlled by manual input from
the cockpit controls. The dual extensible links extend or
retract in response to signals from the AFCS computers.
Movement of the links increases or reduces input from
the cockpit controls to modify input to the upper flight
controls.
NO BREAK - WORK HARDER
The total travel of each dual extensible link is the sum
of the travel of two separate rods. The upper rod is
controlled by the No. 1 computer. The lower rod is
controlled by the No. 2 computer.
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