{"id":"F2006B06162","name":"AD/PDH/3 - Model 3/1000/2 - Hub Inspection","slug":"ad-pdh-3-model-3-1000-2-hub-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46978,"registerId":"commonwealth-F2006B06162-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PDH/3 - Model 3/1000/2 - Hub 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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - De Havilland\n\n \n\nAD/PDH/3 Model 3/1000/2 - Hub Inspection NK\n\nApplicability: All model 3HFB (3/1000/2) propellers. Document:  1. DH TNS Series CT (104) No. 31; or 2. ANO 107.1.4.5.6.2.\n\nCompliance: At each daily or overnight inspection.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1359},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope: mandating hub inspections solely for the specified De Havilland propeller model (3HFB/3/1000/2). No expansion beyond this specific hardware safety issue."},"complexity_factors":["Single, unconditional operational requirement with no exceptions or conditional logic","No definitions section or interpretive provisions","Extremely brief (one substantive paragraph of obligation)","Technical complexity is externalized to referenced engineering documents rather than contained in the legislative text"],"plain_english_summary":"**What it is:** This is an Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it requires:** If you own or operate an aircraft fitted with a De Havilland variable-pitch propeller (specifically model 3HFB, also designated 3/1000/2), you **must inspect the propeller hub** every time you perform a daily or overnight inspection on the aircraft.\n\n**Why it matters:** Propeller hub failures can cause loss of aircraft control. This rule ensures potential cracks or mechanical defects are detected during routine maintenance before they become dangerous.\n\n**Technical details:** The directive doesn't describe the inspection method here — it refers operators to specific technical documents (De Havilland Technical News Sheet CT(104) No. 31 or Airworthiness Notice 107.1.4.5.6.2) for the exact procedures to follow."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection","history":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection/history","analysis":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection/analysis","conflicts":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection/conflicts","importantCases":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection/important-cases","documents":"/api/acts/ad-pdh-3-model-3-1000-2-hub-inspection/documents"}}