EASA SIB 2014-20: Aeroplane Operations in Crosswind Conditions

What to do

Manufacturers should clarify whether gust factors are included in demonstrated crosswind values in manuals. Operators and training organisations should develop or revise operational crosswind limitations reflecting their experience and environment, and incorporate relevant crosswind techniques into initial and recurrent training, including realistic simulator exercises. Competent authorities should consider this bulletin during certification and oversight. No explicit compliance deadlines are provided as the recommendations are non-mandatory.

Summary

EASA Safety Information Bulletin No. 2014-20 titled 'Aeroplane Operations in Crosswind Conditions' provides guidance for aeroplane manufacturers, operators, flight crews, and training organisations on managing operations under strong and gusty crosswind conditions. It highlights findings from studies involving CS-25 certified aeroplanes in commercial air transport, emphasizing the importance of clear understanding and procedures related to maximum demonstrated crosswind limits. The bulletin does not target specific aircraft models but applies broadly to large aeroplanes certified under CS-25.

What changed

This bulletin introduces awareness and recommendations rather than regulatory changes, focusing on clarifying the derivation and use of maximum demonstrated crosswind values in Aircraft Flight Manuals. It encourages manufacturers to specify gust factor inclusion and operators to establish operational crosswind limits based on experience and environment. Additionally, it promotes enhanced pilot training and realistic simulator scenarios for crosswind operations.

Why it matters

Understanding and properly managing crosswind conditions is critical to preventing incidents such as wingtip strikes, tail strikes, hard landings, and runway excursions. This bulletin helps aviation professionals improve safety by addressing gaps in pilot knowledge and operational procedures related to crosswind limits. Operators and training organisations can reduce risk by tailoring training and operational limits to real-world conditions and manufacturer guidance.