NPA 2020-11

Regular update of CS-25

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.