{"id":"F2006B10661","name":"AD/HU 369/101 - Oil Cooler Blower Bracket","slug":"ad-hu-369-101-oil-cooler-blower-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116586,"registerId":"commonwealth-F2006B10661-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/101 - Oil Cooler Blower Bracket","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 369/101 Oil Cooler Blower Bracket 13/99\n\nApplicability: Model 369D, 369E, 369FF, 500N, and 600N helicopters with oil cooler blower bracket, P/No 369F5190-1, installed.\n\n \n\nRequirement: Replace oil cooler blower bracket, P/No. 369F5190-1, with a serviceable bracket, P/No. 369F5194-1.\n\n \n\nNote: FAA AD 99-20-12 also refers.\n\n \n\nCompliance: Within 100 hours time in service after the effective date of this airworthiness directive.\n\n \n\nThis Airworthiness Directive becomes effective on 30 December 1999.\n\n \n\nBackground: There have been reports of cracked oil cooler blower brackets. Failure of a bracket can result in loss of cooling of engine oil and transmission oil and a subsequent forced landing.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific helicopter models. It has not expanded beyond its original purpose of mandating replacement of a defective oil cooler blower bracket."},"complexity_factors":["Single, unambiguous requirement (replace one specific part with another)","Only one condition for applicability (specific helicopter models with specific part number)","Clear compliance deadline (100 hours time in service from effective date)","No cross-references to other legislation sections (only a non-binding note about related FAA directive)","No defined terms section — all terminology is standard aviation maintenance language","Single-page document with straightforward background explanation","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"This safety order mandates replacement of a cracked oil cooler blower bracket (P/No 369F5190-1) with the serviceable bracket (P/No 369F5194-1) on certain McDonnell Douglas (Hughes) and Kawasaki helicopters (models 369D/E/FF, 500N, 600N). Affected operators must comply within 100 flight hours after 30 December 1999. The change prevents loss of engine and transmission oil cooling that can force emergency landings or worse."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive is a targeted corrective measure limited to aircraft fitted with a particular bracket part number; it does not broaden regulatory scope beyond replacing that part within a set timeframe."},"complexity_factors":["Narrow applicability — only Models 369D, 369E, 369FF, 500N, 600N with P/No 369F5190-1 are affected (Applicability).","Clear prescriptive action — mandatory replacement with a specific P/No (Requirement) reduces interpretive complexity.","Short compliance window — 100 hours time in service creates scheduling and operational impact (Compliance).","Logistics and cost burden on operators to obtain and install serviceable brackets (Requirement, Compliance).","Cross-reference to FAA AD 99-20-12 requires coordination/verification with foreign directive (Note).","Safety consequence justification is straightforward (reported cracks leading to loss of oil cooling) but raises enforcement priority (Background)."],"plain_english_summary":"Mechanically: requires replacing oil‑cooler blower bracket P/No 369F5190‑1 with serviceable bracket P/No 369F5194‑1 on specified 369/500/600 series helicopters within 100 flight hours. \n\nIt applies only to helicopters fitted with the listed part and is intended to prevent bracket cracks that can cause loss of engine and transmission oil cooling. Operators pay for parts, fitting and downtime and must source the replacement within the compliance window."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket","history":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket/history","analysis":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket/analysis","conflicts":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket/conflicts","importantCases":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket/important-cases","documents":"/api/acts/ad-hu-369-101-oil-cooler-blower-bracket/documents"}}