{"id":"F2006B05052","name":"AD/CESSNA 180/4 Amdt 1 - Engine Mount","slug":"ad-cessna-180-4-amdt-1-engine-mount","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44962,"registerId":"commonwealth-F2006B05052-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/4 Amdt 1 - Engine Mount","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)  Cessna 180, 182 and Wren 460 Series Aeroplanes\n\n \n\nAD/CESSNA 180/4\n\nAmdt 1\n\n\nEngine Mount 9/80\n\n \n\nApplicability: All models 180, 182 and Wren 460.\n\n \n\nRequirement: Visually inspect the engine mount for cracking in the vicinity of the welded joints between the rear cross member and the bearer tubes.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service.\n\n \n\nBackground: This inspection does not apply to Cessna R182 models as they have an engine mount of different configuration.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3017},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains a tightly focused scope on engine mount safety for specific aircraft models. While labeled as Amendment 1, the instrument remains targeted at its original purpose of preventing structural failures through mandatory inspection, without expanding into unrelated operational or design requirements."},"complexity_factors":["Single, unambiguous operative requirement with no conditional logic","No cross-references to other legislative provisions","Extremely short text (approximately 60 words of substantive content)","Simple periodic compliance trigger (100 hours time in service)","Clear applicability list with only one exclusion noted in background"],"plain_english_summary":"**What this rule does**\n\nThis is a safety inspection requirement for owners of specific light aircraft. It mandates regular visual checks of the engine mount structure to detect dangerous cracks before they cause failure.\n\n**Who it affects**\n\nOwners and operators of:\n- **Cessna 180 series** aircraft\n- **Cessna 182 series** aircraft\n- **Wren 460 series** aircraft\n\n*(Note: This does **not** apply to Cessna R182 models, which have a different engine mount design.)*\n\n**What you must do**\n\nYou must visually inspect the **engine mount** (the metal framework that attaches the engine to the aircraft body) for cracks. Pay particular attention to the **welded joints** (where metal pieces are fused together) connecting the rear cross member to the **bearer tubes** (the support pipes).\n\n**When to comply**\n\nPerform this inspection at least once every **100 hours of flight time** (called \"time in service\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount","history":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount/history","analysis":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount/analysis","conflicts":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount/conflicts","importantCases":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount/important-cases","documents":"/api/acts/ad-cessna-180-4-amdt-1-engine-mount/documents"}}