AD/B737/112 - Yaw Damper Coupler Internal Rate Gyroscope - CANCELLED

This Airworthiness Directive (AD) previously required owners and operators of Boeing 737 aircraft to conduct repetitive inspections of a specific flight stability component—the yaw damper coupler internal rate gyroscope (a spinning sensor that helps prevent the aircraft from swaying left and right during flight).

What has changed This directive has been cancelled effective 17 March 2005. The inspection requirements are no longer necessary because the old electro-mechanical gyroscopes have been replaced with modern dual solid-state sensors under a newer safety directive (AD/B737/123).

Who this affects Owners and operators of Boeing 737 series aircraft who were previously subject to the repetitive inspection requirements of AD/B737/112.

Why it matters This cancellation removes a repetitive maintenance burden, acknowledging that the hardware upgrade made the old inspection regime obsolete.