Which of the following is one of the 'at least two' criteria for GLD Auto Deployment?

• A. Wheel Speed +16 Knots
• B. Thrust Levers Idle
• C. ATIS
• D. System Armed

Answer: (A)

GLD Auto Deployment relies on a safety logic that needs two separate signals to be true before it activates. Having wheel speed rise to a defined threshold—specifically +16 knots—provides a clear, objective on-ground cue that the aircraft is moving on the runway after touchdown, not just taxiing or still airborne. This motion cue helps ensure the deployment occurs only when it’s safe to do so.

The other required signal isn’t shown here, but it’s typically something that confirms the system is allowed to deploy (an enabling state such as the system being armed). The options listed that don’t serve as a reliable deployment trigger—ATIS, or thrust levers being at idle—don’t provide the necessary, verifiable condition for auto deployment. So the wheel speed threshold is the best answer because it represents a concrete, mechanical signal tied to actual ground motion, a key part of the two-condition safety logic.