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FAA Supersedes AD 2025-22-02: H-Stab Anti-Yaw Steady Fitting Block Bolt Checks and Replacement Required for Regional Jet Fleet

The FAA has issued a final Airworthiness Directive (AD 2026-08-02) superseding AD 2025-22-02 for MHI RJ Aviation ULC regional jet models. The AD continues the existing requirement for repetitive torque checks of the horizontal stabilizer (H-stab) anti-yaw steady fitting block bolts and adds a new requirement to replace the H-stab anti-yaw steady fitting block hardware. The unsafe condition—loose or missing bolts that combined with bird strike or gust loading may result in loss of the H-stab and loss of airplane control—affects 597 U.S.-registered airplanes. Compliance costs are estimated at up to $510 per product for retained actions and $622 per product for new actions.

FAA Airworthiness Directive for MHI RJ Aviation ULC Airplanes

The Federal Aviation Administration (FAA) has issued an airworthiness directive (AD) superseding a previous directive for MHI RJ Aviation ULC airplanes, previously under Bombardier, Inc. This rule establishes new requirements for these aircraft.