{"id":"F2006B10728","name":"AD/HU 369/64 - Tail Rotor Bellcrank","slug":"ad-hu-369-64-tail-rotor-bellcrank","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116717,"registerId":"commonwealth-F2006B10728-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/64 - Tail Rotor Bellcrank","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 369/64 Tail Rotor Bellcrank 3/86\n\nApplicability: All model 369D, 369E, 369F, 369FF Helicopters with bellcrank 369D27514 (two bladed) or 369D27515 (four bladed).\n\n \n\nRequirement: Inspect the thickness of the ear at the clevis end of the tail rotor bellcrank in accordance with Service Information Notice DN137, EN25 or FN13.\n\n \n\nCompliance:  Within 100 hours time in service after 28 February 1986 or three months, whichever occurs first for installed items, and for non-installed bell cranks before installation in a helicopter.\n\n \n\nBackground: Improper thickness of the ear may cause failure and loss of control of the tail rotor during helicopter operations.\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":2270},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow, technical focus on tail rotor bellcrank integrity for the specified Hughes/Kawasaki helicopter models. There is no indication of scope expansion beyond this specific airworthiness safety issue."},"complexity_factors":["Single, unambiguous mechanical inspection requirement","Applicability limited to four specific helicopter models and two part numbers","Only three external document references (service bulletins)","Simple binary compliance timeframe (100 hours OR 3 months)","No definitions section, exceptions, or penalty clauses (relying on parent regulations)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of McDonnell Douglas (Hughes) and Kawasaki 369 series helicopters fitted with tail rotor bellcrank parts 369D27514 or 369D27515 to inspect the clevis “ear” thickness per manufacturer Service Information Notices (DN137/EN25/FN13). \n\nInspections must be done within 100 flight hours or 3 months after 28 Feb 1986 for installed parts, and any spares must be checked before installation — to prevent ear failure and loss of tail-rotor control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank","history":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank/history","analysis":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank/analysis","conflicts":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank/conflicts","importantCases":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank/important-cases","documents":"/api/acts/ad-hu-369-64-tail-rotor-bellcrank/documents"}}