Federal Register #2026-07736

FAA Final Rule: Airworthiness Directive for MHI RJ Aviation ULC Regional Jets – Hardware Replacement and Torque Checks

This notice announces a final rule from the Federal Aviation Administration (FAA), part of the Department of Transportation, superseding a previous Airworthiness Directive (AD) for certain MHI RJ Aviation ULC regional jet models. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - Airworthiness Products Section, Operational Safety Branch - OEMs Mentioned: - MHI RJ Aviation ULC (current type certificate holder) - Bombardier, Inc. (previous type certificate holder) - Products/Services Referenced: - Horizontal stabilizer anti-yaw steady fitting block hardware (replacement required) - Applies to models: CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, CL-600-2E25 - Quantity referenced: 597 units (as per attachment) - No specific part numbers provided - Repetitive torque checks of H-stab anti-yaw steady fitting block bolts - Unique/Notable Requirements: - Mandates both repetitive torque checks and hardware replacement to address a critical safety issue - Incorporates Transport Canada AD CF-2025-38 by reference - Addresses risk of loss of horizontal stabilizer and airplane control - Additional Information: - Also modifies Class E airspace at Florence Municipal Airport, Oregon, to support IFR operations - No procurement of products or services is solicited; this is a regulatory safety directive, not a purchasing action

Description

The Federal Aviation Administration (FAA) is issuing a final rule superseding Airworthiness Directive (AD) 2025-22-02 for certain MHI RJ Aviation ULC airplanes previously certified by Bombardier, Inc. This AD continues to require repetitive torque checks of the horizontal stabilizer anti-yaw steady fitting block bolts and additionally mandates replacing the fitting block hardware to address an unsafe condition that could lead to loss of the horizontal stabilizer and consequent loss of airplane control. The directive is effective May 26, 2026, and incorporates by reference Transport Canada AD CF202538 dated August 19, 2025.

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