The Federal Aviation Administration (FAA) has issued a final rule for certain Bombardier airplanes, addressing an issue with the wiring of trim switches that caused uncommanded horizontal stabilizer movements. This directive requires the installation of new trim switch relays to prevent such incidents, which could increase crew workload and potentially lead to loss of airplane control. Affected aircraft must comply with this rule within 3,000 flight hours or five years from March 17, 2025. The directive applies to specific Bombardier aircraft models, and detailed installation instructions are available in the referenced service bulletins.
Simple Explanation
Imagine toy airplanes that have a part that sometimes moves by itself when it shouldn’t. This rule says they need to put a special piece inside to make sure it stays still unless told to move, keeping it safe for everyone flying.