Fuselage — Fuselage Station 559 Circumferential Joint — Interface Metal Chips from Improper Hole Deburring
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier CL-600 series aircraft must revise their approved maintenance programs within 60 days of the directive's effective date to include the specified inspections. They should follow the task numbers and maintenance document revisions outlined in the directive for their specific aircraft serial numbers. Contact Transport Canada or the designated maintenance authority for guidance if needed.
Summary
The Canadian Airworthiness Directive CF-2020-44 addresses the presence of metal chips caused by improper hole deburring at the fuselage station 559 circumferential joint on certain Bombardier aircraft models. This directive applies to Bombardier CL-600-1A11, CL-600-2A12, and various CL-600-2B16 series aircraft within specified serial number ranges. It mandates inspections to detect and prevent potential structural fatigue due to metallic debris at the joint.
What changed
CF-2020-44 introduces a mandatory revision to the approved maintenance schedule to include a detailed special inspection of the fuselage circumferential joint at station 559 between stringers STR10L and STR10R. This inspection aims to identify and address metal particles resulting from improper hole deburring. The directive specifies the relevant maintenance task numbers and revisions for each affected aircraft model.
Why it matters
This directive is critical for aviation professionals because undetected metal chips at the fuselage joint can lead to premature fatigue cracking and compromise structural integrity. Operators, maintenance organizations, and compliance teams must ensure these inspections are incorporated promptly to maintain airworthiness and safety. Failure to comply could result in increased risk of structural failure and regulatory non-compliance.
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