Sofema Aviation Services (SAS) www.sassofia.com considers the steps which are necessary to ensure the Aircraft Reduced Vertical Separation Minima Skin in the vicinity of the Air Data sensors meets the skin waviness requirements. Introduction Aircraft RVSM Skin Mapping is a procedure performed to ensure the airframe’s surface condition (skin waviness) remains within acceptable limits as specified…

Sofema Aviation Services (SAS) www.sassofia.com considers the terms, definitions and differences related to Practical Assessment from an EASA perspective. Introduction The practical assessment addresses the practical portion of any EASA Part 147 type training whereas the OJT assessment addresses the additional practical experience necessary to gain in a true maintenance environment as part of the first type…

Sofema Aviation Services (SAS) www.sassofia.com considers the certification basis of changed aeronautical product Introduction EASA has collaborated with the Federal Aviation Administration (FAA) and Transport Canada (TCCA) on the further improvement of the guidance on the implementation of the ‘Changed Product Rule’ (Part 21.A.101). With this rule, EASA establishes the type-certification basis for changes to Type…

Sofema Aviation Services (SAS) www.sassofia.com considers the Role & Purpose of ARP4754A Introduction ARP4754A serves to demonstrate with an adequate level of confidence that the project complies with the requirements defined by the reference CS and that errors in the design and implementation phases are identified and corrected so that the system meets the applicable Certification…