EASA SIB 2009-17: Unreliable Airspeed indication

What to do

Operators should ensure that flight crews are well-trained and proficient in recognizing and responding to unreliable airspeed indications using manufacturer procedures, including memory items where applicable. Regular training and knowledge assessments should be conducted to maintain crew readiness. There are no mandatory compliance deadlines specified in this bulletin.

Summary

EASA Safety Information Bulletin SIB No: 2009 - 17 addresses the issue of unreliable airspeed indication, highlighting risks observed during the Airbus A330 accident on 01 June 2009. The bulletin discusses potential causes such as pitot-static system malfunctions due to maintenance errors, contamination, environmental conditions, or water ingestion. It emphasizes the importance of flight crew familiarity with procedures to handle unreliable airspeed indications to maintain safe aircraft control.

What changed

This bulletin introduces guidance and recommendations for operators and flight crews to detect, identify, and manage unreliable airspeed indications. It stresses the need for proper training and proficiency checks on procedures outlined in aircraft manuals to ensure safe handling of such events. The document does not impose mandatory requirements but provides safety information to enhance operational safety.

Why it matters

Unreliable airspeed indications can critically affect flight safety by misleading pilots about the aircraft's true speed, potentially leading to loss of control. For operators, maintenance organizations, and compliance teams, understanding and mitigating these risks is essential to prevent accidents and ensure regulatory compliance. Proper crew training and procedural adherence are vital to managing these malfunctions effectively.

What to do

Summary

What changed

Why it matters

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