A4A SPEC 120 2015, Removable Structural Components Industry Guidelines, is a 46-page PDF guidance document from Airlines for America covering best practices for removable structural components (RSCs). It addresses RSC identification, control and maintenance, utilization tracking, data transfer, and supporting forms for component transfer records.
The document is intended for aviation operators, design approval holders, MRO organizations, parts suppliers, regulatory stakeholders, and engineering or maintenance teams managing structural integrity, damage tolerance, airworthiness limitations, repairs, alterations, and maintenance records for transferable aircraft structural components.
Application Scope: Applies to aviation maintenance and engineering programs that need non-mandatory industry guidance for managing removable structural components, including identification, serialization considerations, utilization assignment, tracking, transfer records, and related continued airworthiness practices.
