To achieve automatic spoiler extension during landing, what must be true?

To achieve automatic spoiler extension during landing, it is essential that both thrust levers are at forward idle and the spoilers are armed. This condition ensures that the aircraft is in a landing configuration and is close to the runway. The automatic deployment of spoilers enhances deceleration by increasing drag, which is critical for safety during landing.

Having the thrust levers at forward idle indicates the pilots are no longer applying thrust and are committed to landing. Additionally, arming the spoilers means the system is prepared to deploy them when the necessary conditions are met. This integration of thrust management and spoiler readiness is vital for the function to operate correctly and efficiently.

In contrast, requiring normal brakes to be operational is important for stopping the aircraft but is not the primary condition for spoiler deployment. Likewise, while autobrakes are helpful in controlling deceleration, they are not a requisite condition for automatic spoiler extension. Wheel speed limitations also do not directly govern the extension of spoilers, as the automatic system primarily relies on the thrust lever position and arming status.