Which of the following actions is NOT procedurally correct during a full stop landing?

The correct answer focuses on the triple board method for speed determination, which is not a standard practice during a full stop landing in the T-6B. In this context, using a standardized, recognized approach to gauge speed is crucial to ensure a safe and controlled landing. The triple board method may not accurately reflect the aircraft's speed in relation to landing criteria or could introduce unnecessary complexity during an already critical phase of flight.

The other options represent standard and recommended procedures. Selecting NWS (Nose Wheel Steering) after clearing the active runway is correct and ensures that the aircraft can be maneuvered safely on the taxiway without confusion or risk of collision. Applying brakes while holding forward stick pressure under 80 KIAS helps maintain control of the aircraft during deceleration, preventing potential nose-up attitudes that could lead to a loss of control. Lastly, maintaining centerline control until landing is a fundamental aspect of effective flight operations, ensuring that the aircraft is aligned properly with the runway centerline throughout the landing process. These practices enhance safety and effectiveness during landing, making them essential components of the full stop landing procedure.