{"id":"F2007L02459","name":"AD/CL-600/82 - Aft Fuselage Frame at FS 640","slug":"ad-cl-600-82-aft-fuselage-frame-at-fs-640","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67967,"registerId":"commonwealth-F2007L02459-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-600/82 | Aft Fuselage Frame at FS 640 | 9/2007 |\n| ------------ | ---------------------------- | ------ |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial numbers 7003 through 7999.                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of Transport Canada AD CF-2003-12.Note: Bombardier Service Bulletin 601R-53-061 Revision B, or later Transport Canada approved revision, refers.                   |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of30 August 2007.                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 30 August 2007.                                                                                                                                             |\n| Background:    | Cracks were detected on the frame and reinforcement angles at fuselage station 640 on several Regional Jet in-service aircraft. Failure of this frame could degrade the structural integrity of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/CL-600/82","sectionType":"part","heading":"AD/CL-600/82","content":"## AD/CL-600/82","sortOrder":1},{"sectionNumber":"Aft Fuselage Frame at FS 640","sectionType":"part","heading":"Aft Fuselage Frame at FS 640","content":"## Aft Fuselage Frame at FS 640","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific structural defect in specific aircraft. It has not expanded beyond its original purpose of addressing the cracked frame issue."},"complexity_factors":["Very short document (under 300 words)","Only one defined term implicitly used (fuselage station 640 — a technical measurement, not a legal definition)","No cross-references to other legislation — only references to external technical documents (Transport Canada AD and Bombardier Service Bulletin)","Simple conditional structure: single applicability criterion (specific model and serial numbers) leading to single mandatory action","No exceptions, exemptions, or nested conditions","Straightforward compliance date with no alternative methods or phased implementation"],"plain_english_summary":"CASA requires owners/operators of Bombardier Challenger CL-600-2B19 (serials 7003–7999) to inspect and repair the fuselage frame and reinforcement angles at fuselage station 640 after cracking was found. Compliance follows Transport Canada AD CF-2003-12 and Bombardier Service Bulletin 601R-53-061 Rev B. Effective 30 Aug 2007."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The instrument does not alter the applicability or substantive requirements; it directs compliance with Transport Canada AD CF-2003-12 and the referenced Bombardier service bulletin (Requirement). The only explicit change noted in the text is a revised effective date of 30 August 2007 (Compliance), not a change to scope or affected fleet."},"complexity_factors":["Reliance on external technical mandates: the AD mandates action 'in accordance with' Transport Canada AD CF-2003-12 and a Bombardier service bulletin rather than setting procedures itself (Requirement).","Narrow, serial-numbered applicability increases administrative tracking for operators owning CL-600-2B19 SN 7003–7999 (Applicability).","Timing/administration: the instrument specifies a revised effective date of 30 August 2007 which affects scheduling and compliance windows (Compliance).","Safety-critical technical work: addresses cracks on aft fuselage frame at FS 640; inspections/repairs may require structural work and possible aircraft downtime (Background).","Compliance cost allocation: operators of affected aircraft bear the cost and operational impact of inspections and corrective actions (Applicability, Requirement, Compliance).","Enforcement and legal effect are immediate on the effective date and overseen under CASA authority as evidenced by the Delegate's signature (Compliance / signature block).","Limited procedural detail in this instrument increases dependence on the referenced AD and service bulletin for substantive steps and acceptability of fixes (Requirement)."],"plain_english_summary":"Requires operators of Bombardier CL-600-2B19 aircraft, serial numbers 7003–7999, to carry out inspections and corrective action in accordance with Transport Canada AD CF-2003-12 and the Bombardier Service Bulletin 601R-53-061 Rev B (or later approved revision). It becomes effective 30 August 2007 and responds to detected cracks at fuselage station 640 that could affect structural integrity."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640","history":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640/history","analysis":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640/analysis","conflicts":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640/conflicts","importantCases":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640/important-cases","documents":"/api/acts/ad-cl-600-82-aft-fuselage-frame-at-fs-640/documents"}}