The allowed gap inspection is generally to check the fasteners in how many specific areas?

The correct answer pertains to the standard practice in aerospace assembly, specifically the inspection of fasteners and their gaps. Fasteners, such as bolts and rivets, are critical components that hold various parts of an aircraft together. An allowed gap inspection is performed to ensure that these fasteners are properly installed and do not exhibit excessive looseness or gaps that could compromise structural integrity.

Typically, the inspection checks the fasteners in three specific areas:

1. The Head of the Fastener – This area is scrutinized for signs of wear or improper seating.

2. The Shaft – This part is inspected for the overall length and any discrepancies that might affect its retention.

3. The Grip Area – This refers to the portion of the fastener that holds the components being joined. It is crucial that this area maintains the correct pressure and alignment to ensure a secure connection.

By focusing on these three distinct areas, inspectors can better verify the overall integrity and safety of the fastener installation. This thorough approach is essential in aerospace applications where the reliability of fasteners directly impacts aircraft safety and performance.