EASA AD CF-2024-39: Flight Controls — Uncommanded and Unarrested Flap Movement | RegNotify

Airworthiness DirectiveEASA AD CF-2024-39

Flight Controls — Uncommanded and Unarrested Flap Movement

Published: Dec 3, 2024
Effective: Dec 13, 2024

Bombardier CL-600 (Challenger)

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators of Bombardier CL-600-1A11, CL-600-2A12, and CL-600-2B16 aircraft must update their AFMs with the specified Transport Canada approved revisions within 60 days of December 13, 2024. They must also inform all flight crews about the new procedures and ensure these are followed during operations. Compliance with these actions is mandatory before conducting any take-off.

Summary

Canadian Airworthiness Directive CF-2024-39 addresses the issue of uncommanded and unarrested flap movement in Bombardier Inc. model CL-600-1A11, CL-600-2A12, and CL-600-2B16 aeroplanes. This directive mandates updates to the Aircraft Flight Manual (AFM) to provide flight crews with specific procedures to follow if such flap movements occur. The directive aims to enhance flight safety by mitigating risks associated with flap control system failures.

What changed

CF-2024-39 introduces a requirement to amend the Transport Canada approved AFM for the affected Bombardier Challenger models by incorporating new emergency and abnormal procedures related to uncommanded flap movements. It also mandates that flight crews be advised of these changes and operate the aircraft accordingly. This is a new regulation that supplements previous interim actions by requiring formal AFM updates.

Why it matters

This directive is critical for aviation professionals because uncommanded flap movements can lead to loss of aircraft control, posing serious safety risks. Operators and maintenance teams must ensure compliance to prevent in-flight incidents and maintain regulatory adherence. Flight crews need updated procedures to respond effectively to flap system anomalies, enhancing operational safety.

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