Aircraft Speed Brake Control System

The speed brakes (flight spoilers) automatically retract when the speed brake handle is not in the RETRACTED position and the Thrust Lever Angle (TLA) is 90% or angle of attack limiting is encountered.

The ground spoiler switch is used to select the ground spoiler system OFF in the event of a ground spoiler component failure or deployed ground spoiler panel.

Each Flight Control Computer (FCC) transmits on four separate BD429 buses to the spoiler Remote Electronics Units (REUs), providing a total of eight independent FCC buses for spoiler control. Additionally, the Brake and Flap Control Unit (BFCU) provides two separate ARINC 429 buses, one for each outboard flight spoiler Electro-Hydraulic Actuator (EBHA) REU.

<p>In the event where both outboard flight spoiler REUs fail, the MCE (Modular Avionics Unit) bus allows the FCCs to retain control of the surface by directly commanding the MCE, which normally controls the spoiler surfaces through the EBHA REUs.</p> Signup and view all the answers

<p>The Spoiler Panel Fail CAS message indicates a failure of a ground spoiler component or a deployed ground spoiler panel.</p> Signup and view all the answers