Gulfstream G650ER Autopilot System Description Quiz

The Brake-by-Wire system controls the braking of the aircraft. When this system fails, the amber 'Brake By Wire Fail' message is displayed.

The aircraft indicates a failure of the left or right wing retrim system with the amber 'Retrim Left Wing Down' or 'Retrim Right Wing Down' messages.

The 'L-R Aileron Fail' message indicates a failure of both remote electronics units or a loss of aileron command to both ailerons. This results in a loss of roll authority.

<p>The 'Roll Authority Limit' amber message indicates that the roll axis flight control surfaces are approaching their maximum displacement.</p> Signup and view all the answers

<p>The 'Speed Brake Auto Retract' message indicates that the speed brakes (flight spoilers) have automatically retracted due to the speed brake handle not being in the RETRACTED position and the throttle lever angle being at 90% or angle of attack limiting being encountered.</p> Signup and view all the answers

<p>The RVDT sensors provide electrical inputs to the flight control computers (FCCs) to monitor the position of the flight control surfaces. Two RVDT sensors provide data to FCC No. 1, two sensors provide data to FCC No. 2, and one sensor provides data to the BFCU. The FCCs and BFCU use this position data to determine the appropriate control actions to take in order to move the flight control surfaces to the commanded position.</p> Signup and view all the answers

<p>The two FCCs and the BFCU receive the RVDT sensor data, which provides the commanded position of the flight control surfaces. Using control laws, the FCCs and BFCU determine the appropriate electronic signals to send to the Remote Electronic Units (REUs) associated with each actuator in order to move the flight control surfaces to the commanded position.</p> Signup and view all the answers

<p>The aircraft has redundant RVDT sensors, with two sensors providing data to FCC No. 1, two sensors providing data to FCC No. 2, and one sensor providing data to the BFCU. Additionally, each FCC interfaces with one sensor on each wheel, providing further redundancy. The RVDT cluster is designed to return to a neutral position only if the main cluster shaft is sheared off, enhancing the system's fault tolerance.</p> Signup and view all the answers

<p>The REUs are the interface between the FCCs and the flight control actuators. The FCCs send electronic signals to the REUs associated with each actuator in order to move the flight control surfaces to the commanded position, as determined by the RVDT sensor data and the control laws within the FCCs and BFCU.</p> Signup and view all the answers

<p>The two FCCs and the BFCU receive the RVDT sensor data, which provides the commanded position of the flight control surfaces. Using control laws, the FCCs and BFCU determine the appropriate electronic signals to send to the REUs associated with each actuator in order to move the flight control surfaces to the commanded position.</p> Signup and view all the answers