{"id":"F2006B06189","name":"AD/PHS/12 - Pacific 6533A Propeller Blade","slug":"ad-phs-12-pacific-6533a-propeller-blade","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47051,"registerId":"commonwealth-F2006B06189-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PHS/12 - Pacific 6533A Propeller Blade","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - Hamilton Standard\n\n \n\nAD/PHS/12 Pacific 6533A Propeller Blade 5/88 DM\n\nApplicability: All model 22D40/6533A-12 propellers fitted to but not limited to Airtractor 301 series aircraft.\n\n \n\nRequirement: Action in accordance with Hamilton Standard Alert Service Bulletin No A663. Compliance:               In accordance with the Requirement Document.\n\nBackground: A number of operators have experienced tip failure of the Pacific 6533A-12 blade.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2205},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original, targeted scope: mandating remedial action for the specific safety defect (tip failure) in Pacific 6533A-12 propeller blades installed on Airtractor 301 series aircraft. No expansion beyond this specific technical remedy is evident."},"complexity_factors":["Extremely brief text (under 75 words of substantive legislative content)","Single external incorporation by reference (Service Bulletin A663) containing the actual technical requirements","No defined terms, nested conditions, or exceptions within the directive text","Narrow applicability limited to specific aircraft model and propeller part number"],"plain_english_summary":"**What this is:** A mandatory aviation safety notice (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority under aviation law.\n\n**Who it affects:** Owners and operators of **Airtractor 301 series** agricultural aircraft fitted with specific Hamilton Standard propellers (model **22D40/6533A-12**).\n\n**What it requires:** You must follow the instructions in **Hamilton Standard Alert Service Bulletin No A663**. This external technical document sets out the specific actions (such as inspections, repairs, or replacements) needed to address the safety issue.\n\n**Why it matters:** The propeller blades have been experiencing **tip failures** (breaking at the ends), which poses a serious risk of loss of control or structural damage during flight. This directive makes the manufacturer's recommended safety fix legally compulsory."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade","history":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade/history","analysis":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade/analysis","conflicts":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade/conflicts","importantCases":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade/important-cases","documents":"/api/acts/ad-phs-12-pacific-6533a-propeller-blade/documents"}}