True or False: Inspecting flushness of fasteners in practice holes is nonessential.

Inspecting the flushness of fasteners in practice holes is essential because it directly impacts the integrity and functionality of the assembly. Flush fasteners ensure that the surfaces are aligned properly and there are no protrusions that could interfere with adjacent components or systems. Proper alignment helps maintain the aerodynamic characteristics of the aircraft, prevents wear and tear on components, and ensures safety during flight operations.

Neglecting to check for flushness can lead to various issues, such as increased drag, potential damage to other parts, or failure to meet regulatory standards. Therefore, verifying that fasteners are properly seated and flush contributes significantly to the overall quality and performance of aerospace assemblies.