Just a short video showing inside the Main, or Forward, Electronic Equipment Bay
Most of the noise in here is from the cooling system fans drawing air through the components.
The video starts off looking at the rudder/brake pedal linkages and just behind those, the control wheel and column linkages. Both the pedals and control wheel/column are cross connected, so when one pilot moves a control, the other pilot’s controls also move.
There are no mechanical connections to any of the control surfaces. Instead, the movement of the controls are fed into sensors called LVDTs (Linear Variable Differential Transformers) and load transducers. An actuator connected to a spring can adjust the level of force needed to move the controls and this simulates the extra force needed to move a control surface when the aircraft speed increases in a conventional aircraft.
The sensors are directly connected to the ACEs (Actuator Control Electronics), The ACEs then communicate to the FCEs (Flight Control Electronics) which provide flight envelope protection, so the pilot shouldn’t be able to make the aircraft perform dangerous maneuvers. The modified signal is sent back the ACEs, and the ACEs then control the actual control surface movement via electronically controlled hydraulic actuators.
The heart of the IFE (In Flight Entertainment) system is also located in this equipment bay, and this accounts for some of the enormous amount of wiring. There is a mixture of communication wiring, to and from sensors, electrical power wiring, and fibre optic cables in the mass bundles you can see.
Hollywood would have you believe that this area, and often the landing gear bays, are accessible from the passenger cabin, but this is not the case. The only access is via the external fuselage door you see at the end.
Not something most passengers will have seen, so I hope it’s not too boring 😋