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Aircraft Aileron System Overview

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Questions and Answers

How is the aircraft roll command initiated?

The aircraft roll command is initiated when either control wheel in the cockpit is rotated counterclockwise or clockwise.

What is the role of the FCCs in the aircraft roll command?

The FCCs receive the signal from the control module assembly through BD429 data buses and send it to the REUs in the wing.

How do the flight spoilers move in relation to the ailerons during aircraft roll?

The two flight spoiler panels rise together when the corresponding aileron reaches 0.5° aileron trailing edge up.

What is the function of the RUDDER trim switches on the trim control panel?

The RUDDER (yaw) trim switches on the trim control panel are directly read by the FCC for the electronic trim function. Signup and view all the answers

How are aileron and flight spoiler positions controlled to achieve the desired input roll rate?

The FCC signal enables the correct combination of aileron and flight spoiler positions. Signup and view all the answers

What are the three states of operation for the EBHA?

Active hydraulic (normal), Damped bypass, Electrical backup (de-energized) Signup and view all the answers

How does the EHSV modulate the flow of fluid in the EBHA system?

To provide the desired actuator movement Signup and view all the answers

What is the role of the PSV in controlling the state between normal and electrical backup in the EBHA?

The PSV controls the state transition between normal and electrical backup Signup and view all the answers

How does the REU and MCE contribute to the positional control of the EBHA in active hydraulic state with normal hydraulic power?

By energizing a torque motor to position the MSV and PSV Signup and view all the answers

What happens when the EBHA is commanded into the active state with normal hydraulic power?

The MSV and PSV are positioned for normal hydraulic power flow Signup and view all the answers