{"id":"F2006B02577","name":"AD/AUS/7 - Engine Mount Attachment Bolt","slug":"ad-aus-7-engine-mount-attachment-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41833,"registerId":"commonwealth-F2006B02577-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AUS/7 - Engine Mount Attachment Bolt","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)  Auster/Beagle A.61 Series Aeroplanes\n\n \n\nAD/AUS/7 Engine Mount Attachment Bolt 4/50\n\nApplicability: All models.\n\n \n\nRequirement: 1. Inspect the heads of the upper and lower engine mount attaching bolts for identification marking.\n\n \n\n2. Replace bolts marked “NEWTON” with high tensile bolts to B.S.S. Specification No. 2A.15.\n\n \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 \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":1255},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope addressing a specific manufacturing defect in engine mount bolts for Auster/Beagle A.61 aircraft. There is no indication of scope expansion beyond the initial airworthiness concern."},"complexity_factors":["Extremely brief — only two substantive requirements","No defined terms, interpretation sections, or legislative cross-references","Simple unconditional obligation with no exceptions, exemptions, or conditional logic","Immediate compliance with no staging, transitional periods, or alternative compliance methods"],"plain_english_summary":"**What it is:** An immediate safety order for owners of Auster/Beagle A.61 series light aircraft.\n\n**What it requires:**\n*   **Inspection:** Check the engine mount bolts (the bolts that attach the engine to the airframe) for any marked \"NEWTON\".\n*   **Replacement:** If you find \"NEWTON\" bolts, replace them immediately with high-tensile bolts meeting British Standard Specification 2A.15.\n\n**Who it affects:** Anyone operating or maintaining Auster/Beagle A.61 series aeroplanes.\n\n**Why it matters:** The engine mount keeps the engine attached to the plane. If these bolts fail due to insufficient strength, the engine could detach during flight — with catastrophic results. This directive grounds the aircraft until the defect is fixed (compliance is \"forthwith\" — meaning immediately)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aus-7-engine-mount-attachment-bolt","history":"/api/acts/ad-aus-7-engine-mount-attachment-bolt/history","analysis":"/api/acts/ad-aus-7-engine-mount-attachment-bolt/analysis","conflicts":"/api/acts/ad-aus-7-engine-mount-attachment-bolt/conflicts","importantCases":"/api/acts/ad-aus-7-engine-mount-attachment-bolt/important-cases","documents":"/api/acts/ad-aus-7-engine-mount-attachment-bolt/documents"}}