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Regulatory Background STC applicants are required from EASA to demonstrate design capability in accordance with EASA Part 21 Subpart J; by way of derogation they can demonstrate design capability in the form of Alternative Procedures to Design Organisation Approval (AP to DOA). EASA certifies this demonstration of design capability by issuing a Finding of Compliance…

Introduction Due to their inherent criticality, all changes to the design of an aircraft are required to be approved in some form. How this is achieved varies from country to country. Generally, modifications and repairs deemed to be “minor”, such as the installation of a radio or the repair to upholstery, may be approved by…

EASA & FAA Supplemental Type Certificate (STCs) Aircraft Maintenance Considerations A Supplemental Type Certificate (STC) is an FAA or EASA approved major modification or repair to an existing type certified aircraft, engine or propeller. As it adds to the existing type certificate, it is deemed ‘supplemental’. As its name suggests, an STC is a certificate….

Sofema Aviation Services considers the implementation of an Occurrence Reporting Culture within an EASA Maintenance Environment. Whilst we all recognise the importance of safety in particular within “our” Maintenance Environment we face as an industry the problem of (Some say) Chronic under reporting of safety incidents. Please consider when was the last time YOU filed…