Modular construction of an aircraft control system

Apparatus for disabling operation of an aircraft by an on-board pilot, said aircraft having an aircraft control system for controlling at least one controlled component including at least one of (i) an aircraft engine throttle and (ii) an aircraft attitude control surface, said aircraft control system actuating said at least one controlled component in response to one of (i) first control signals received from a control device manually actuated by the onboard pilot and (ii) second control signals received from at least one alternate source of control, said apparatus comprising, in combination:

• (a) a first control module having an interruptible link which passes said first control signals from said control device to said aircraft control system, said first control module including first connecting means for (i) interrupting said link and (ii) directing said first control signals to a second control module;
• and
• (b) a second control module adapted to be connected to said first control module and including second connecting means, responsive to third control signals, for connecting one of (i) said first control signals received from said first control module and (ii) said second control signals received from said at least one alternate source of control to said aircraft control system for control of said controlled component;
• wherein, said first connecting means is responsive to the act of connection of said second control module to said first control module to (a) interrupt said link, (b) direct said first control signals to said second connecting means and (c) connect said aircraft control system to said second connecting means;
• and
• wherein said third control signals cause said second connecting means to select said second control signals to pass to said aircraft control system for controlling the controlled component.