Airworthiness DirectiveEASA AD CF-2017-38

Landing Gear — Main Landing Gear — Piston Axle Corrosion

Published: Dec 22, 2017
Effective: Jan 3, 2018
Deadline: Jan 3, 2018

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must amend their Transport Canada approved maintenance schedules within 30 days of January 3, 2018, to include the detailed inspection task 320100-228. Initial inspections must be performed within specified timeframes depending on the piston/axle service entry date, with repeat inspections every 36 months thereafter. Compliance can also be demonstrated through prior approved inspections, restorations, or repairs as detailed in the directive.

Summary

Canadian Airworthiness Directive CF-2017-38 addresses corrosion issues on the piston axle of the main landing gear in Bombardier Inc. aircraft models CL-600-2C10 (serial 10002 and later), CL-600-2D15, CL-600-2D24 (serial 15001 and later), and CL-600-2E25 (serial 19001 and later). The directive mandates inspections to detect damage to the protective coating and corrosion that could lead to axle separation. It introduces maintenance requirements to ensure continued airworthiness of the affected landing gear components.

What changed

This new Airworthiness Directive introduces a mandatory maintenance task requiring detailed visual inspections of the main landing gear piston/axle to detect corrosion and coating damage. It specifies inspection intervals based on the time since the piston/axle entered service and requires incorporation of task 320100-228 into the approved maintenance schedule within 30 days of the effective date. The directive also recognizes compliance through certain Bombardier service bulletins, restorations, or repairs.

Why it matters

This directive is critical for aviation professionals to prevent potential failure of the main landing gear piston axle due to corrosion, which could lead to axle separation and compromise aircraft safety. Operators and maintenance organizations must update their maintenance programs to include the new inspection task, ensuring regulatory compliance and continued airworthiness. Timely inspections reduce the risk of unexpected landing gear failures and associated operational disruptions.

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