EASA AD CF-2022-24R1
Flight Controls - Stabilizer Trim Switch Failure
Summary
Canadian Airworthiness Directive CF-2022-24R1 addresses the failure of the stabilizer trim switch on Bombardier BD-100-1A10 aircraft. This directive mandates inspection, removal, and replacement of affected horizontal stabilizer pitch trim switches to prevent unintended nose-down stabilizer movement. It applies to all serial numbers of the BD-100-1A10 model.
What Changed
CF-2022-24R1 revises the previous AD CF-2022-24 by correcting the Bombardier Service Bulletin revision date references and allowing the use of later approved revisions of the service bulletins. It also adds clarifications regarding the inspection and replacement procedures for trim switches and control wheels with specific part numbers.
Why It Matters
This AD is critical for maintaining flight safety by preventing uncommanded horizontal stabilizer movements that could lead to loss of control or increased pilot workload. Operators and maintenance teams must ensure compliance to avoid potential in-flight control issues and to maintain regulatory airworthiness standards.
What To Do
Operators must verify aircraft technical records within 200 flight hours or 6 months from 28 October 2022, inspect and replace affected trim switches as specified, and perform operational tests following Bombardier service bulletins. Installation of certain trim switch part numbers with affected serial numbers is prohibited from the effective date.
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