{"id":"F2006B08972","name":"AD/DHA-3/16 Amdt 1 - Undercarriage Bolts P/N U3-129 - Inspection","slug":"ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52569,"registerId":"commonwealth-F2006B08972-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/16 Amdt 1 - Undercarriage Bolts P/N U3-129 - 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)  DHA-3 (Drover) Series Aeroplanes\n\n \n\nAD/DHA-3/16\n\nAmdt 1\n\n\nUndercarriage Bolts P/N U3-129 - Inspection 10/57\n\n \n\nApplicability: All models modified to DH Mod. DRO 82. Document:  DH TNS CT(A3) No. 104.\n\nCompliance: At intervals not exceeding 500 hours time in service.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1544},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original narrow scope of inspecting specific undercarriage bolts on modified DHA-3 aircraft. It does not expand beyond the specific part number and aircraft model originally targeted."},"complexity_factors":["Extremely brief document (under 100 words)","Single, unambiguous compliance requirement (inspection)","Only one external reference to manufacturer technical documentation","Clear applicability criteria (specific aircraft model + specific modification)","No conditional logic or nested exceptions"],"plain_english_summary":"**What this is:** A safety rule (Airworthiness Directive) issued by the Civil Aviation Safety Authority for specific aircraft.\n\n**What it requires:** Owners and operators of DHA-3 \"Drover\" aeroplanes must inspect specific bolts on the undercarriage (landing gear) if their aircraft has been modified according to \"DH Mod. DRO 82\". The bolts to check are part number U3-129.\n\n**How often:** These inspections must happen at least every 500 hours of flight time (\"time in service\").\n\n**Why it matters:** Faulty undercarriage bolts can cause landing gear collapse during takeoff or landing. This directive prevents accidents by ensuring critical hardware is checked regularly.\n\n**Who is affected:** Anyone operating DHA-3 Drover aircraft with the specific modification mentioned above. The technical details are found in the manufacturer’s document referenced as \"DH TNS CT(A3) No. 104\"."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection","history":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection/history","analysis":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection/analysis","conflicts":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection/conflicts","importantCases":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection/important-cases","documents":"/api/acts/ad-dha-3-16-amdt-1-undercarriage-bolts-p-n-u3-129-inspection/documents"}}