Which of the following describes the correct action when using a torque wrench?

The correct approach when using a torque wrench is to stop when an audible indication occurs. Torque wrenches are designed to provide an accurate measurement of rotational force applied to fasteners, ensuring they are tightened to a specific specification. When the wrench reaches the preset torque value, it emits an audible click or signal. This auditory cue indicates that the required torque has been achieved, preventing over-tightening, which could lead to joint failure, damage to components, or unsafe conditions. Recognizing this sound is crucial, as it helps maintain the integrity of the assembly, ensuring that fasteners are neither too loose nor too tight.

Other options involve incorrect practices that could compromise the assembly process. Turning counterclockwise is not a standard action for tightening bolts; instead, it generally loosens them. Continuing to turn until the wrench breaks suggests excessive force beyond the tool's limitations, which could not only damage the wrench but also lead to inaccurate torque application. Finally, limiting the use of the torque wrench solely to instructed situations undermines its importance in ensuring safety and compliance with engineering specifications. Regular and appropriate use of a torque wrench is vital in aerospace assembly mechanics.