Accidents and incidents have been caused by the degradation of aircraft aerodynamic performances, reduction of safety margins and reduction of manoeuvrability/controllability due to airframe ground icing contamination or inadequate de-/anti-icing operations. EASA has received a number of safety recommendations in this respect. It is therefore proposed to review the existing certification specifications and acceptable means of compliance.
The objective of this task is to mitigate the risk of loss of control of an aeroplane (in particular during, but not limited to, the take-off phase), and the risk of runway excursion after an aborted take-off at high speeds.
To achieve this objective, it shall be considered whether there is a need for amending the existing specifications and/or to introduce new certification specifications and acceptable means of compliance into CS-23 and CS-25 requiring the applicant of a type certificate to perform an assessment of the effect of contaminated aerodynamic surfaces on aircraft performances, handling qualities, and controllability. In addition, it shall also be considered whether such requirement could be imposed on certain already certified large aeroplanes through an amendment of Part-26/CS-26.