What is one responsibility of the holder of an inspection authorization?

The holder of an inspection authorization (IA) has the crucial responsibility to ensure conformity and approve major alterations on aircraft. This role is significant because the IA is entrusted with verifying that modifications or repairs to an aircraft meet the applicable standards set by the FAA and relevant aviation regulations. By approving these alterations, the IA helps maintain the safety and airworthiness of the aircraft, ensuring that it complies with federal requirements and is fit for flight.

The approval of major alterations is a sophisticated task that requires in-depth knowledge and understanding of the airframe and powerplant systems. The IA's authority in this area is a vital check in the aviation safety system, as major alterations can significantly impact an aircraft's performance and safety.

While other options pertain to important aviation roles, they do not align with the specific duties of an IA. For instance, providing pilot certifications and issuing airworthiness directives are responsibilities associated with the FAA and pilot certification bodies, not the role of an IA. Leading routine inspections without oversight does not accurately reflect the collaborative and regulated nature of maintenance activities, where the input of an IA or licensed personnel is typically required to ensure compliance with safety standards.