AD 2025-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
| aircraft | Bombardier | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
Unsafe Condition
Loose or missing bolts on the anti-yaw steady fitting block when combined with a bird strike or gust loading may result in loss of the horizontal stabilizer and consequent loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the tightening torque on the four attachment bolts that attach the steady block by replacing any bolt or nut that is loose or missing and then torquing all four bolts and nuts. Replace the H-Stab anti-yaw steady fitting block hardware, including measuring four-hole diameters on the steady block and steady fitting, rework any hole diameter if required, and installing and torquing new hardware attachments (bolts, nuts, washers, and cotter pins) to create a double safety device on the hardware that attach the steady block to the steady fitting.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701, and 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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