What is the definition of a "major alteration" in terms of documentation?

A "major alteration" refers to a significant change to the aircraft’s operating limits, and this definition is crucial for understanding regulatory compliance in aviation maintenance. Major alterations are defined by the FAA and involve changes that could affect the safety or operational capability of the aircraft. Such alterations necessitate meticulous documentation and often require a specific form of approval, such as a Supplemental Type Certificate (STC).

When performing a major alteration, maintenance personnel must adhere to stringent guidelines, as these changes may influence various aspects of the aircraft’s performance and safety features. Proper documentation ensures that maintenance records are comprehensive, allowing future inspectors or technicians to understand the aircraft's modifications fully.

The other options do not align with the accepted definition. Minor adjustments or repairs typically do not require the same level of documentation as major alterations. Additionally, procedures that do not affect airworthiness are not classified as major alterations, while any significant change must be properly recorded to maintain the aircraft's regulatory standing.