{"id":"F2007L02457","name":"AD/CL-600/42 Amdt 1 - Lower Wing Plank","slug":"ad-cl-600-42-amdt-1-lower-wing-plank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67962,"registerId":"commonwealth-F2007L02457-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Canadair) CL-600 (Challenger","sectionType":"division","heading":"Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes","content":"### Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n| AD/CL-600/42 Amdt 1 | Lower Wing Plank | 9/2007 |\n| ------------------- | ---------------- | ------ |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial numbers 7003 through 7869.                                                                                                                                                                                                                                                                                                                                                    |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the Requirements of Transport Canada AD CF-2001-15R1.Note: Incorporation of the modification in accordance with Bombardier Service Bulletin 601R-57-037 Revision B, or later Transport Canada approved revision, constitutes terminating action to the inspection requirements of this Directive.                                                                                      |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of30 August 2007.                                                                                                                                                                                                                                                                                                                        |\n|                | This Amendment becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                                                                              |\n| Background:    | Cracks on the left and right hand sides of the lower wing plank at wing station 148 have been discovered on a number of in-service aircraft. Failure of the lower wing plank would compromise the structural integrity of the wing.Amendment 1 is issued in response to a revision of the related Transport Canada AD, which introduces a terminating modification to the AD repetitive inspection requirements. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/CL-600/42 Amdt 1","sectionType":"part","heading":"AD/CL-600/42 Amdt 1","content":"## AD/CL-600/42 Amdt 1","sortOrder":1},{"sectionNumber":"Lower Wing Plank","sectionType":"part","heading":"Lower Wing Plank","content":"## Lower Wing Plank","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 1 aligns the directive with the revised Transport Canada AD CF-2001-15R1 and introduces a terminating modification option: installing Bombardier Service Bulletin 601R-57-037 Rev B (or later Transport Canada–approved revision) ends the repetitive inspection obligation. Operators who adopt the modification exit the inspection cycle; operators who do not remain subject to recurring inspections."},"complexity_factors":["Narrow applicability limited to CL-600-2B19 serial numbers 7003–7869 (Applicability).","Depends on another regulator's instrument: directs action in accordance with Transport Canada AD CF-2001-15R1 (Requirement).","Provides a terminating modification route via Bombardier Service Bulletin 601R-57-037 Rev B or later, creating two compliance paths (Note).","Addresses a safety-critical structural defect (cracks at wing station 148), which raises technical inspection and repair complexity (Background).","Amendment updates effective date and aligns domestic directive with the revised Transport Canada AD, requiring operators to track external approvals and revisions (Compliance; Background)."],"plain_english_summary":"Requires operators of Bombardier CL-600-2B19 aircraft (serial numbers 7003–7869) to follow Transport Canada AD CF-2001-15R1 inspection and modification requirements to detect and fix cracks in the lower wing plank at wing station 148, because failure could compromise wing integrity. (Requirement; Background)\n\nOperators must carry out repetitive inspections unless they incorporate Bombardier Service Bulletin 601R-57-037 Revision B (or a later Transport Canada–approved revision), which terminates the inspection requirement; operators bear the direct compliance cost and scheduling burden."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive maintaining its original purpose of ensuring structural integrity of specific aircraft. The amendment simply updates the compliance date and adds a terminating modification option, which is a routine refinement rather than scope expansion."},"complexity_factors":["Very short document (under 300 words)","Only 4 defined elements: specific aircraft model, serial number range, referenced Canadian AD, and terminating service bulletin","Single compliance pathway with clear alternative (inspect repeatedly OR modify once)","No nested conditions or exceptions","Minimal cross-referencing (only to one external Canadian document and one manufacturer service bulletin)","Straightforward effective date structure"],"plain_english_summary":"This CASA Airworthiness Directive mandates operators of Bombardier Challenger CL-600-2B19 (S/N 7003–7869) to follow the equivalent Transport Canada AD to inspect for cracks in the lower wing planks at wing station 148. \n\nIt affects aircraft owners and maintenance organisations, aims to prevent potential wing structural failure, aligns Australian rules with Canadian safety measures, and allows a terminating modification (Bombardier SB 601R-57-037 Rev B) to end repetitive inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank","history":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank/history","analysis":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank/analysis","conflicts":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank/conflicts","importantCases":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank/important-cases","documents":"/api/acts/ad-cl-600-42-amdt-1-lower-wing-plank/documents"}}