Bombardier Inc. - Aft Nose Landing Gear Door Upper Attachment Hinge Assemblies
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators and maintenance personnel should carefully inspect the upper attachment hinge assemblies for security and abnormalities whenever maintenance is performed around the aft nose landing gear door. The new self-locking nut should be installed each time the door is removed and reinstalled. Any findings should be reported to Bombardier Customer Response Center and Transport Canada as per CAR 521 requirements.
Summary
Transport Canada Civil Aviation Service Difficulty Advisory AV-2010-02 addresses a potential issue with the aft nose landing gear door upper attachment hinge assemblies on Bombardier Inc. CL-600-2C10, CL-600-2D15, and CL-600-2D24 aircraft. The advisory highlights incidents where a self-locking nut backing out caused hinge pin disengagement, leading to door binding and damage during landing gear extension. Bombardier has issued temporary maintenance manual revisions to mitigate this issue.
What changed
This advisory introduces a recommendation for installing a new self-locking nut each time the aft nose landing gear door is removed and reinstalled. It also brings attention to excessive bearing wear found during investigations and advises increased inspection vigilance. The advisory does not mandate an airworthiness directive but serves as a non-mandatory notification to operators and maintenance personnel.
Why it matters
The issue can cause damage to the nose landing gear door and surrounding structure, potentially affecting safe landing gear operation. For operators and maintenance teams, awareness and proper inspection of the hinge assemblies are critical to prevent in-flight malfunctions and costly repairs. Early detection of abnormalities ensures continued airworthiness and operational safety.
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