What is a required part of the documentation process when performing alterations on an aircraft?

When performing alterations on an aircraft, obtaining field approval is necessary if major alterations are made. This is a critical component of the documentation process as it ensures that the alterations comply with Federal Aviation Administration (FAA) regulations and safety standards. Major alterations are considered significant enough to affect the aircraft's performance, reliability, or safety, and thus require a more robust oversight and documentation process.

Field approval involves submitting the relevant data and plans for the alteration to a qualified FAA representative or designated engineering representative (DER) for review. Once this review is complete and the approval is granted, it is documented properly. This step is vital in maintaining the aircraft's airworthiness and ensuring that all modifications are officially recognized by regulatory authorities.

By obtaining field approval, the integrity and safety of the aircraft are safeguarded, making it a mandated part of the process when major alterations are involved. Addressing major alterations through this formal channel protects both the operator and the aircraft's future operation, aligning with the rigorous safety protocols established by aviation authorities.