Accelerate-stop distance ends with bringing the airplane to a stop using braking action only. Which action is not considered in this distance?

• A. Thrust Reversing
• B. Braking
• C. Spoilers
• D. Wheel Brakes

Answer: (A)

The main idea here is understanding what accelerate-stop distance includes. It’s the distance from the start of the takeoff roll to a full stop if you abort at or before V1, using the airplane’s deceleration methods that are directly part of braking: wheel brakes, any drag devices like spoilers, and the resulting aerodynamic and braking forces to slow the airplane.

Thrust reversers aren’t counted in this distance because the scenario specifies braking action only. If you used thrust reversers, you’d get additional deceleration beyond braking, changing the distance. Spoilers and wheel brakes are integral to braking: spoilers increase drag and press the wheels harder onto the runway to improve braking effectiveness, and wheel brakes are the primary means of slowing the airplane. That’s why thrust reversing is the action not considered in this distance.