For what purpose is a torque wrench primarily used in aircraft maintenance?

A torque wrench is primarily designed to tighten bolts to a specified torque value, which is crucial in aircraft maintenance for ensuring that fasteners are neither over-tightened nor under-tightened. Proper torque application is essential for the structural integrity and safety of aircraft components. When a bolt is tightened to the manufacturer’s specifications, it achieves the necessary clamping force to hold parts securely without risking damage to the bolt, the material, or reducing the effectiveness of the assembly.

Using a torque wrench helps maintain the appropriate tension in the bolts and prevents potential failure that could arise from improper torque application. This precision is critical in aircraft maintenance, where safety is paramount, as incorrect torque settings could lead to mechanical failures during operations.

The other options do not align with the specific purpose of a torque wrench. Measuring pressure, ensuring alignment, or measuring component lengths are tasks associated with other tools designed for those specific functions.