{"id":"F2007L02143","name":"AD/CL-600/75 - Structural Inspection Program Revision","slug":"ad-cl-600-75-structural-inspection-program-revision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67320,"registerId":"commonwealth-F2007L02143-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-600/75 | Structural Inspection Program Revision | 8/2007 |\n| ------------ | -------------------------------------- | ------ |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial number 7003 and subsequent; without Modsum TC601R16421 or later Transport Canada approved revision, incorporated.                                                                                                                                                                                                                |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of Transport Canada AD CF-2005-05.                                                                                                                                                                                                                                                                                       |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of2 August 2007.                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 2 August 2007.                                                                                                                                                                                                                                                                                                    |\n| Background:    | During the CRJ-100 complete aircraft fatigue test, a crack was detected at the lower forward corner of the cargo door cut-out. Cracking of the cargo door surround structure, which has been identified as principal structural element, could adversely affect aircraft structural integrity. This Directive introduces a revised repeat inspection task schedule. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 June 2007","sortOrder":0},{"sectionNumber":"AD/CL-600/75","sectionType":"part","heading":"AD/CL-600/75","content":"## AD/CL-600/75","sortOrder":1},{"sectionNumber":"Structural Inspection Program Revision","sectionType":"part","heading":"Structural Inspection Program Revision","content":"## Structural Inspection Program Revision","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive maintaining its original scope. ADs are inherently narrow, technical instruments addressing specific safety defects in specific aircraft types. The document remains focused on its original purpose: mandating inspection of the cargo door structure on affected CL-600-2B19 aircraft. No scope creep is evident."},"complexity_factors":["Short, single-purpose directive (approximately 200 words of substantive content)","Only 1 defined applicability criterion (serial number range plus modification status)","Single cross-reference to external document (Transport Canada AD CF-2005-05) — the actual technical requirements are incorporated by reference rather than reproduced","No nested conditional logic or exceptions within the directive text itself","Straightforward compliance structure: single effective date with reference to external schedule","Minimal legislative machinery — no interpretation sections, penalty clauses, or administrative procedures included"],"plain_english_summary":"This Airworthiness Directive requires repeated structural inspections of the cargo door surround on Bombardier CL-600-2B19 (CRJ-100) aircraft, serials 7003 onward, unless a specific structural modification is installed, using procedures from Transport Canada.  \n\nIt responds to fatigue-test cracks at the lower forward cargo door corner—a principal structural element—so repeated inspections aim to detect cracking before it risks structural failure. Effective 2 August 2007."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Yes. The directive adopts Transport Canada AD CF-2005-05 for affected CL-600-2B19 aircraft and introduces a revised repeat-inspection task schedule (effective 2 August 2007) for aircraft without Modsum TC601R16421 or later. Mechanically, this changes inspection obligations and timing for the specified fleet subset compared with the prior inspection regime."},"complexity_factors":["Cross-reference to an external instrument (Transport Canada AD CF-2005-05) — the AD delegates substantive inspection details to another document.","Applicability gating by serial number (CL-600-2B19, s/n 7003+) and by absence of Modsum TC601R16421 or a later Transport Canada-approved revision — requires operator records verification.","Change to the repeat-inspection schedule — alters maintenance planning, intervals and resource allocation.","Safety-critical technical focus (cargo-door surround cracking identified in fatigue testing) — inspection criteria and thresholds are technical and likely detailed in the referenced AD.","Fixed effective date (2 August 2007) — creates a compliance deadline for affected operators.","Regulatory enforcement and delegation noted (signed by CASA delegate) — compliance obligations sit with operators and maintenance organisations under CASA oversight."],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier CL-600-2B19 aircraft (serial numbers 7003 and later) that have not incorporated Modsum TC601R16421 (or a later Transport Canada–approved revision) to perform the inspection actions set out in Transport Canada AD CF-2005-05, adopting a revised repeat-inspection schedule effective 2 August 2007. It responds to cracking found during a CRJ-100 fatigue test at the cargo-door cut-out; inspections target the cargo-door surround to protect aircraft structural integrity and impose inspection and maintenance obligations on operators and maintenance organisations."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-75-structural-inspection-program-revision","history":"/api/acts/ad-cl-600-75-structural-inspection-program-revision/history","analysis":"/api/acts/ad-cl-600-75-structural-inspection-program-revision/analysis","conflicts":"/api/acts/ad-cl-600-75-structural-inspection-program-revision/conflicts","importantCases":"/api/acts/ad-cl-600-75-structural-inspection-program-revision/important-cases","documents":"/api/acts/ad-cl-600-75-structural-inspection-program-revision/documents"}}