{"id":"F2006B02082","name":"AD/AC/23 - Main Landing Gear Struts - Inspection and Modification","slug":"ad-ac-23-main-landing-gear-struts-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41312,"registerId":"commonwealth-F2006B02082-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/23 - Main Landing Gear Struts - Inspection and Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 5/1962,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Main Landing Gear Struts - Inspection and Modification,23\ntitle: Airworthiness Directive - AD/AC/23 - Main Landing Gear Struts - Inspection and Modification\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)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/23 Main Landing Gear Struts - Inspection\n\nand Modification\n\nApplicability: All models: S/Nos. 871, 875 and 893 to 1193. Document:  Aero Commander SB No. 80.\n\nCompliance: Forthwith.\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\n5/62\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1597},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains focused on its original specific purpose: addressing main landing gear strut integrity on identified aircraft models through mandatory inspection and modification."},"complexity_factors":["Extremely brief text with no defined terms section","Single external cross-reference to manufacturer service bulletin","Specific serial number applicability rather than general application","Unconditional immediate compliance requirement with no exceptions or conditional logic"],"plain_english_summary":"**What this requires:** Owners and operators of specific Twin Commander aircraft must immediately inspect and modify the main landing gear struts on their planes.\n\n**Who is affected:** This applies to Twin Commander (Gulfstream/Rockwell/Aero Commander 500, 600 and 700 series) aeroplanes with serial numbers 871, 875, and 893 through 1193.\n\n**What must be done:** You must follow the instructions in **Aero Commander Service Bulletin No. 80** to inspect and modify the main landing gear struts.\n\n**When:** Compliance is required **forthwith** (immediately). There is no grace period.\n\n**Why it matters:** This directive addresses safety concerns with the main landing gear struts to prevent potential structural failures during landing or ground operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification","history":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification/history","analysis":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification/important-cases","documents":"/api/acts/ad-ac-23-main-landing-gear-struts-inspection-and-modification/documents"}}