Which unit coordinates stab trim brakes and spoiler stabilization?

Which unit coordinates stab trim brakes and spoiler stabilization?

• A. Spoiler Stabilizer Control Unit (SSCU)
• B. Flight Control Computer 1
• C. Rudder PCU
• D. Yaw Damper Unit

Answer: (A)

The Spoiler Stabilizer Control Unit is the one that coordinates stab trim brakes with spoiler stabilization. This unit specifically handles how the stabilizer trim brakes interact with the spoiler system to keep pitch and roll behavior stable during changes in trim or when spoilers are deployed. By timing and applying the stabilizer trim brakes as needed, it prevents trim runaway and ensures the spoilers provide the intended stabilization without fighting the stabilizer. Other units have different roles: the Flight Control Computer 1 issues primary surface commands, the Rudder PCU drives the rudder, and the Yaw Damper Unit focuses on yaw damping. None of them are dedicated to coordinating stab trim braking with spoiler stabilization, so they don’t fit this function.

The Spoiler Stabilizer Control Unit is the one that coordinates stab trim brakes with spoiler stabilization. This unit specifically handles how the stabilizer trim brakes interact with the spoiler system to keep pitch and roll behavior stable during changes in trim or when spoilers are deployed. By timing and applying the stabilizer trim brakes as needed, it prevents trim runaway and ensures the spoilers provide the intended stabilization without fighting the stabilizer.

Other units have different roles: the Flight Control Computer 1 issues primary surface commands, the Rudder PCU drives the rudder, and the Yaw Damper Unit focuses on yaw damping. None of them are dedicated to coordinating stab trim braking with spoiler stabilization, so they don’t fit this function.