{"id":"F2006B09075","name":"AD/DHC-3/26 - Tailplane Hinge Bolts","slug":"ad-dhc-3-26-tailplane-hinge-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52855,"registerId":"commonwealth-F2006B09075-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-3/26 - Tailplane Hinge Bolts","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)  DHC-3 (Otter) Series Aeroplanes\n\n \n\nAD/DHC-3/26 Tailplane Hinge Bolts 5/71\n\nApplicability: All models.\n\n \n\nRequirement: Action in accordance with De H Canada SB No 3/14.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1971 and thereafter at intervals not exceeding 800 hours time in service.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1218},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: regulating maintenance of specific hardware on a specific aircraft type. No significant scope creep detected."},"complexity_factors":["Single operational requirement referencing external technical document (Service Bulletin)","Minimal conditional logic (only applicability by aircraft model)","Simple compliance timing formula (initial + recurring intervals)","No defined terms section or nested exceptions"],"plain_english_summary":"This **Airworthiness Directive (AD)** mandates safety checks on the tailplane hinge bolts of De Havilland Canada DHC-3 \"Otter\" aircraft.\n\n**What it requires:**\n- Aircraft owners/operators must follow the instructions in **De Havilland Canada Service Bulletin No 3/14** (likely involving inspection or replacement of the bolts that attach the tailplane to the fuselage).\n- **When:** First compliance within 100 hours of flying time after 30 June 1971, then repeated every 800 hours of flying time thereafter.\n\n**Who it affects:** Anyone operating DHC-3 (Otter) series aircraft in Australia.\n\n**Why it matters:** Tailplane hinge bolts are critical structural components. If they fail, the pilot could lose control of the aircraft's pitch, leading to catastrophic accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts","history":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts/history","analysis":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts/analysis","conflicts":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts/conflicts","importantCases":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts/important-cases","documents":"/api/acts/ad-dhc-3-26-tailplane-hinge-bolts/documents"}}