EASA SIB 2017-10R1: En-route Wake Turbulence Encounters

What to do

Pilots and operators should maintain passenger seat belt announcements even when the seat belt sign is off, use wake turbulence category call sign suffixes like "HEAVY" or "SUPER" for relevant aircraft, and consider lateral offsets or flight level changes to avoid wakes when feasible. Air traffic service providers should enhance controller awareness through training and consider local procedures to warn pilots of potential wake encounters. No mandatory compliance deadlines are specified, as the bulletin provides non-binding recommendations.

Summary

EASA Safety Information Bulletin 2017-10R1 is an updated guidance document addressing en-route wake turbulence encounters affecting all fixed-wing aircraft operating above 10,000 feet mean sea level. It highlights risks associated with wake vortices generated by heavy aircraft such as the Airbus A380-800 and other large aeroplanes, which can persist for minutes and pose hazards to following or crossing traffic. The bulletin provides awareness information and recommendations for pilots, air traffic controllers, and operators to mitigate wake turbulence risks during the en-route phase of flight.

What changed

This revision updates the original EASA SIB 2017-10 issued on 22 June 2017 by incorporating recent research findings and enhanced operational recommendations. It emphasizes the increased frequency of en-route wake turbulence encounters due to higher traffic volumes and improved navigation precision. The bulletin also clarifies hazardous traffic configurations and suggests best practices for pilots and air traffic services to better anticipate and manage wake turbulence risks.

Why it matters

The document is crucial for aviation professionals as it raises awareness of en-route wake turbulence hazards that can lead to loss of control and passenger injuries. Operators and controllers gain practical insights into risk factors such as crossing traffic, tropopause altitude, and aircraft weight categories, enabling improved safety management. Understanding these risks helps reduce incidents and supports compliance with existing separation minima and operational procedures.