{"id":"F2006B10739","name":"AD/HU 369/74 - Particle Separator Filter Bypass Door Latch","slug":"ad-hu-369-74-particle-separator-filter-bypass-door-latch","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116738,"registerId":"commonwealth-F2006B10739-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/74 - Particle Separator Filter Bypass Door Latch","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 369/74 Particle Separator Filter Bypass Door Latch 3/88\n\nApplicability: All model 369 series helicopters.\n\n \n\nRequirement: Action in accordance with McDonnell Douglas SIN No. HN-213, DN-152, EN-41, FN-30, as applicable.\n\n \n\nCompliance: Accomplish at the next annual inspection after 30 April 1988 or the next time the particle separator filter bypass door is removed; whichever occurs first.\n\n \n\nBackground:  The manufacturer has received reports of the latches on the engine inlets filter bypass door fracturing and allowing the latch portion of the assembly to fall into the plenum chamber which in turn could result in damage to the engine.\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":2271},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains tightly scoped to the original safety issue of fracturing bypass door latches on the 369 helicopter series. There is no indication of scope expansion beyond the initial intent to prevent engine damage from failed components."},"complexity_factors":["Single, specific mechanical defect addressed with no exceptions or exemptions","Applicability limited to one helicopter series with no conditional exclusions","Simple compliance timeframe using two alternative trigger events","Technical requirements incorporated by reference to external manufacturer documents rather than detailed in the text"],"plain_english_summary":"This directive requires operators of McDonnell Douglas (Hughes) and Kawasaki 369 series helicopters to inspect and repair the particle separator filter bypass door latch per the manufacturer's service notices (HN-213, DN-152, EN-41, or FN-30). A fractured latch can fall into the plenum and be ingested, risking engine damage or failure.  \n\nWork must be done by the next annual inspection after April 30, 1988, or the next time the door is removed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch","history":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch/history","analysis":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch/analysis","conflicts":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch/conflicts","importantCases":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch/important-cases","documents":"/api/acts/ad-hu-369-74-particle-separator-filter-bypass-door-latch/documents"}}