Landing Gear — Main Landing Gear Shock Strut Lower Pin Cracking
- Published
- Effective
- Deadline
- Replaces
- 2020-54R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and repetitive lubrication, detailed visual inspections, and non-destructive testing of the main landing gear shock strut lower pin according to specified flight hour and cycle intervals. If any cracks or damage are found, the pin must be replaced before further flight. The modification involving replacement of trailing arm bushings and installation of new dynamic joint components must be completed within 60 months from the AD's effective date to terminate repetitive inspection requirements.
Summary
Canadian Airworthiness Directive CF-2023-32 addresses cracking issues in the main landing gear shock strut lower pin, part number 19146-3, on Bombardier Inc. CL-600-2B16 aircraft with specified serial numbers. The directive mandates inspections, lubrication, and a modification involving replacement of trailing arm bushings and installation of new dynamic joint components. This AD applies to CL-604, CL-605, and CL-650 variants of the CL-600-2B16 series.
What changed
CF-2023-32 supersedes AD CF-2020-54R1 and introduces a new design solution requiring modification of the main landing gear shock strut assembly to trailing arm assembly joint with new dynamic joint components. Until this modification is completed, the previous inspection and lubrication requirements remain in effect. The new AD also sets specific intervals for lubrication, detailed visual inspections, and non-destructive testing of the shock strut lower pin.
Why it matters
This directive is critical for maintaining the structural integrity of the main landing gear and preventing potential gear collapse due to pin cracking. Operators and maintenance organizations must comply to ensure continued airworthiness and safety of affected Bombardier CL-600-2B16 aircraft. Adhering to these requirements helps avoid unscheduled maintenance and potential operational disruptions.
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