{"id":"F2006B08579","name":"AD/CL-600/2 - Elevator Inboard Hinge Fitting - Inspection and Replacement","slug":"ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51418,"registerId":"commonwealth-F2006B08579-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CL-600/2 - Elevator Inboard Hinge Fitting - Inspection and Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n \n\n# AD/CL-600/2 Elevator Inboard Hinge Fitting - Inspection\n\nand Replacement Applicability: All models with S/Nos. 1005 to 1008 and 1010 and subsequent. Document:               Canadair Challenger TM Alert No. T-A600-0018-002.\n\nCompliance: 1. Inspect within 300 hours time in service after 31 March 1983.\n\n# 3/83\n\n \n\n2. Repeat inspection at intervals not exceeding 150 hours time in service until fitting replaced.\n\n \n\nNote: Replace fitting before further flight if any cracks are found.\n\n \n\nBackground: A weakness is suspected in elevator inboard hinge fittings P/No. 600-23045-1 and -2.\n\nSteel replacements have been introduced.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1518},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original targeted scope addressing a specific suspected defect in identified aircraft elevator hinge fittings. It remains focused on the single safety-critical requirement of inspecting and replacing the defective aluminum fittings with steel replacements."},"complexity_factors":["Single, clearly defined aircraft applicability limited to specific serial number ranges","Straightforward two-stage compliance timeline (initial inspection plus recurring intervals)","Simple binary condition for mandatory action (crack detection triggers immediate replacement)","No cross-references to other legislation, regulations, or complex defined terms","Limited scope to one specific mechanical part with a clear replacement protocol"],"plain_english_summary":"This directive mandates safety inspections for specific Bombardier Challenger aircraft (serial numbers 1005–1008 and 1010 onwards). **What it does:** Requires inspection of the elevator inboard hinge fittings (part numbers 600-23045-1 and -2) — these are the pivot points that allow the elevator (the moving surface controlling the aircraft's up/down pitch) to work. **Timeline:** First inspection must happen within 300 flight hours after 31 March 1983, then repeated every 150 flight hours until the part is replaced. **Critical requirement:** If inspectors find any cracks, the fitting must be replaced with a stronger steel version before the aircraft can fly again. **Why it matters:** The original aluminum fittings have a suspected structural weakness that could compromise flight safety. This rule ensures potentially defective parts are identified and replaced with safer steel alternatives."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement","history":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement/history","analysis":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement/important-cases","documents":"/api/acts/ad-cl-600-2-elevator-inboard-hinge-fitting-inspection-and-replacement/documents"}}