EASA AD CF-2022-24R1: Flight Controls - Stabilizer Trim Switch Failure | RegNotify

Airworthiness DirectiveEASA AD CF-2022-24R1

Flight Controls - Stabilizer Trim Switch Failure

Published: Oct 18, 2022
Effective: Oct 28, 2022
Deadline: Oct 28, 2022
Replaces: 2022-24

Bombardier BD-100 1A10

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

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.

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.

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