{"id":"F2006B04378","name":"AD/BELL 205/42 - Main Rotor Hub Inboard Fitting - Life Reduction","slug":"ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44203,"registerId":"commonwealth-F2006B04378-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 205/42 - Main Rotor Hub Inboard Fitting - Life Reduction","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\nBell Helicopter Textron 205 Series Helicopters\n\n \n\nAD/BELL 205/42 Main Rotor Hub Inboard Fitting - Life Reduction\n\n\n7/78\n\n \n\nApplicability: All model 205. Document: Bell SB No. 205-78-3.\n\nCompliance: As per the requirement document.\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2058},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope concerning life limits for the specific rotor hub component on the specified helicopter model."},"complexity_factors":["Single operative requirement referencing external technical documentation (Bell SB No. 205-78-3) for substantive compliance details","No defined terms, interpretation section, or conditional logic","Simple unqualified applicability statement covering all Model 205 aircraft"],"plain_english_summary":"This **Airworthiness Directive (AD)** is a mandatory safety order issued by the Civil Aviation Safety Authority (CASA).\n\n**What it requires**\nOperators of **Bell 205 series helicopters** must reduce the approved service life (known as 'life limits') of the **main rotor hub inboard fitting** — the critical component connecting the main rotor blades to the aircraft. Essentially, this part must be replaced or overhauled more frequently than originally planned.\n\n**Why it matters**\nThe directive addresses safety risks regarding metal fatigue or cracking in this high-stress component. If the fitting fails in flight, the main rotor could separate from the helicopter, leading to a catastrophic accident.\n\n**How to comply**\nOwners must follow the specific technical instructions — including new hour limits, inspection methods, and replacement schedules — detailed in **Bell Service Bulletin No. 205-78-3**.\n\n**Who is affected**\nAll owners and operators of Bell Model 205 helicopters in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction","history":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction/history","analysis":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction/analysis","conflicts":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction/conflicts","importantCases":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction/important-cases","documents":"/api/acts/ad-bell-205-42-main-rotor-hub-inboard-fitting-life-reduction/documents"}}