The objective of this Notice of Proposed Amendment (NPA) is to reflect the state of the art of large aeroplane certification and improve the harmonisation of CS-25 with the Federal Aviation Administration (FAA) regulations. To that end, this NPA proposes amendments to CS-25 following the selection of non-complex, non controversial, and mature subjects.
In particular, this NPA proposes amendments in the following areas:
Item 1: AMC 25 Subpart H: corrections of references in the correlation table;
Item 2: Turbo-propeller vibrations;
Item 3: Fabrication methods;
Item 4: Windshield – Failure conditions with structural effects;
Item 5: Cabin safety – references to FAA AC 25-17A ‘Transport Airplane Cabin Interiors Crashworthiness Handbook’.
The proposed amendments are expected to provide a moderate safety benefit, would have no social or environmental impacts, and would provide some economic benefits by streamlining the certification process.