{"id":"F2006B10684","name":"AD/HU 369/20 - Adjustable Upper Engine Mount Assemblies - Inspection","slug":"ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116632,"registerId":"commonwealth-F2006B10684-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/20 - Adjustable Upper Engine Mount Assemblies - Inspection","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)  McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\n \n\nAD/HU 369/20 Adjustable Upper Engine Mount Assemblies - Inspection\n\nApplicability: All models except those exempted by SIN No. HN-95. Document:  Hughes SIN No. HN-95.\n\nCompliance: Within 300 hours time in service after 30 August 1976 or next engine change whichever occurs first.\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\n \n\n \n\n\n8/76\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 narrow scope regarding specific helicopter engine mount inspections without expansion into unrelated systems or aircraft types."},"complexity_factors":["Very short length (single requirement)","Only one conditional timing provision (300 hours vs engine change)","Minimal cross-referencing (only to SIN HN-95)","Simple applicability statement with single exemption","No nested definitions or subordinate legislation references"],"plain_english_summary":"This airworthiness directive mandates safety inspections of **adjustable upper engine mount assemblies** on McDonnell Douglas (Hughes) and Kawasaki 369 series helicopters.\n\n**Who it affects:** Owners and operators of these specific helicopter models, except those already covered by exemptions in Service Information Notice (SIN) HN-95.\n\n**What it requires:** You must inspect the upper engine mount assemblies according to the procedures in Hughes SIN No. HN-95.\n\n**When:** The inspection must be completed within 300 hours of flight time after 30 August 1976, or at the next engine change—whichever happens first.\n\n**Why it matters:** This prevents potential engine mount failures that could cause the engine to separate from the aircraft structure, creating a serious flight safety hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection","history":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection/history","analysis":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection/analysis","conflicts":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection/conflicts","importantCases":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection/important-cases","documents":"/api/acts/ad-hu-369-20-adjustable-upper-engine-mount-assemblies-inspection/documents"}}