Landing Gear – Main Landing Gear (MLG) Lower Spindle Pin Corrosion
Superseded. A newer version replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2021-22
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial inspections of the MLG lower spindle pin within specified flight cycle or calendar time limits depending on aircraft usage history, with deadlines ranging from 6 months after 20 May 2021 to up to 48 months after entry into service. Repetitive inspections are required every 3000 flight cycles or 24 months thereafter. Any damage found must be repaired or the spindle pin replaced following Airbus Canada Service Bulletin BD500-321003 instructions.
Summary
Canadian Airworthiness Directive CF-2021-22R1 addresses corrosion issues on the main landing gear (MLG) lower spindle pin of Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft. This directive mandates inspections and necessary repairs or replacements to prevent potential failure of this critical structural component. It applies to all serial numbers of the specified aircraft models.
What changed
This revision extends the initial inspection interval from 36 months to 48 months based on operational findings and analysis. It also corrects previous time compliance requirements and continues to require repetitive inspections every 3000 flight cycles or 24 months. The directive supersedes the earlier AD CF-2021-22 issued on 5 July 2021.
Why it matters
The MLG lower spindle pin is a principal structural element whose failure could lead to landing gear collapse, posing serious safety risks. Operators, maintenance organizations, and compliance teams must monitor and address corrosion to ensure continued airworthiness and prevent costly unscheduled repairs or accidents. Adhering to this directive supports regulatory compliance and aircraft safety.
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New ADs and bulletins for Airbus BD-500 (A220 Series), Canada BD-500-1A10 and Canada BD-500-1A11, summarized like this page, every Monday.