{"id":"F2006B10706","name":"AD/HU 369/44 Amdt 1 - Collective Torque Tube and Bungee Support Brackets - Inspection","slug":"ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116676,"registerId":"commonwealth-F2006B10706-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/44 Amdt 1 - Collective Torque Tube and Bungee Support Brackets - 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 369/44\n\nAmdt 1\n\n\nCollective Torque Tube and Bungee Support Brackets - Inspection\n\n\n6/80\n\n \n\nApplicability: All 500D model with S/Nos. 0003D to 0642D, 0646D to 0654D, 0656D, 0663D to 0671D, 0684D to 0687D, 0692D to 0701D.\n\n \n\nDocument: Hughes SIN No. DN-54.1.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1980.\n\n \n\nBackground: The torque tube bracket may have become damaged or cracked in the lug area and inspection of the collective bungee support bracket for web thickness is necessary. This Directive is raised in issue to redefine serial numbers of aircraft affected and to refer to a revised issue of the requirement document.\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":2528},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment redefines the specific aircraft serial numbers subject to the inspection requirement compared to the original directive, effectively changing which helicopters are captured, and updates the reference to the revised technical specification document."},"complexity_factors":["Multiple specific serial number ranges with exclusions listed in applicability section","Technical aviation terminology requiring specialized engineering knowledge (torque tube, bungee support bracket, lug area, web thickness)","Reference to external technical document (Hughes Service Instruction No. DN-54.1)","Compliance measured by 'time in service' (flight hours) rather than calendar date"],"plain_english_summary":"This directive orders owners/operators of certain McDonnell Douglas (Hughes) 500D helicopters to inspect two critical flight‑control fittings—the collective torque‑tube lug and the collective bungee support bracket—for cracks, damage, or reduced web thickness. Inspections must be done within 100 flight hours after June 30, 1980. It clarifies affected serial numbers and references an updated technical manual because bracket failure could cause loss of rotor control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection","history":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection/history","analysis":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection/analysis","conflicts":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection/conflicts","importantCases":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection/important-cases","documents":"/api/acts/ad-hu-369-44-amdt-1-collective-torque-tube-and-bungee-support-brackets-inspection/documents"}}