{"id":"F2007L02462","name":"AD/CL-600/85 - Fuselage Frame FS409+128 Bulkhead Web","slug":"ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67979,"registerId":"commonwealth-F2007L02462-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-600/85 | Fuselage Frame FS409+128 Bulkhead Web | 9/2007 |\n| ------------ | ------------------------------------- | ------ |\n\n| Applicability: | Model CL-600-2B19 aircraft, serial numbers 7003 through 7185.                                                                                                                                                                                                                                                    |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of Transport Canada AD CF-97-11R2.Note: Accomplishment of Canadair Service Bulletins SB 601R-53-047 original issue or SB 601R-53-046, or later Transport Canada approved revisions, constitutes terminating action for the inspection requirements of this Directive. |\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:    | A report was received of a fatigue crack approximately 14-inches in length that had propagated in the pressure bulkhead frame at the forward end of the fuselage wing box cutout. Inspection of additional aircraft revealed cracking in the same location.                                                      |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 July 2007","sortOrder":0},{"sectionNumber":"AD/CL-600/85","sectionType":"part","heading":"AD/CL-600/85","content":"## AD/CL-600/85","sortOrder":1},{"sectionNumber":"Fuselage Frame FS409+128 Bulkhead Web","sectionType":"part","heading":"Fuselage Frame FS409+128 Bulkhead Web","content":"## Fuselage Frame FS409+128 Bulkhead Web","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive adopts and enforces the inspection and repair requirements set out in the referenced Transport Canada AD for the specified serial-number range and identifies service bulletins as terminating action. It does not, on its face, expand applicability or requirements beyond the referenced documents."},"complexity_factors":["Narrow applicability: applies only to CL-600-2B19 serial numbers 7003–7185.","Dependence on external instrument: mandates action 'in accordance with' Transport Canada AD CF-97-11R2 rather than reproducing procedures.","Terminating action delegated to specific service bulletins (SB 601R-53-047 or SB 601R-53-046) or later Transport Canada–approved revisions.","Technical nature: requires fatigue-inspection and possible structural repair work by specialised maintenance organisations.","Compliance timing: explicit effective date (30 August 2007) creates a hard regulatory deadline for operators."],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier CL-600-2B19 aeroplanes (serials 7003–7185) to carry out inspections and any necessary repairs in line with Transport Canada AD CF-97-11R2, effective 30 August 2007. It responds to a reported ~14‑inch fatigue crack in the pressure-bulkhead frame; following specified Canadair service bulletins provides terminating action. Aircraft operators must arrange and pay for the inspections and repairs; the regulator approves compliance and acceptable repairs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a narrow, specific scope — addressing a known structural defect in a defined aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined applicability criterion (specific serial number range)","Single cross-reference to external Canadian aviation document (Transport Canada AD CF-97-11R2)","Simple conditional logic: compliance with specified service bulletins constitutes terminating action","No nested exceptions or layered conditional provisions","Straightforward compliance date (single fixed date)","Minimal legislative machinery — essentially a direct adoption of foreign aviation safety requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and repairs of the pressure bulkhead frame near the wing box cutout on Bombardier CL-600-2B19 Challengers (serials 7003–7185), following Transport Canada AD CF-97-11R2. Completing Bombardier SB 601R-53-047 or SB 601R-53-046 terminates the repetitive inspections.\n\nIt responds to discovery of a ~14‑inch fatigue crack and further cracking at the same location, a critical risk for rapid decompression. Effective 30 August 2007; it affects owners, operators and maintenance organisations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web","history":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web/history","analysis":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web/analysis","conflicts":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web/conflicts","importantCases":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web/important-cases","documents":"/api/acts/ad-cl-600-85-fuselage-frame-fs409-128-bulkhead-web/documents"}}