Landing Gear — Main Landing Gear (MLG) and Doors — Forward Door Linkage Sleeves Missing Greasing Grooves
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must verify aircraft maintenance records within 30 days of the directive's effective date to determine if affected sleeves were installed or replaced after October 29, 2019. If records are inconclusive or indicate replacement, an inspection and necessary corrective actions must be completed within 1500 flight cycles. Additionally, installation of non-compliant sleeves is prohibited from the directive's effective date onward.
Summary
The Canadian Airworthiness Directive CF-2022-29 addresses an issue with the main landing gear forward door linkage sleeves on De Havilland DHC-8-401 and -402 aircraft, serial numbers 4001, 4003, and subsequent. The directive mandates inspections and corrective actions due to missing greasing grooves on part number 46878-1 sleeves, which could lead to fatigue failure and potential landing gear malfunction. This safety measure aims to prevent asymmetric landing gear configuration and runway excursions.
What changed
CF-2022-29 introduces mandatory verification of maintenance records and inspections to identify and replace non-compliant forward door linkage sleeves lacking greasing grooves. It prohibits installation of these non-conforming sleeves as replacement parts and requires corrective action within specified flight cycles. This is a new directive addressing a manufacturing defect discovered in parts supplied between October 2019 and July 2021.
Why it matters
This directive is critical for operators and maintenance organizations to ensure the integrity of the main landing gear system, preventing potential mechanical failures that could compromise aircraft safety during landing. Compliance reduces the risk of asymmetric gear deployment and runway excursions, thereby protecting passengers, crew, and aircraft. It also ensures adherence to Canadian aviation safety regulations.
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