{"id":"F2006B09113","name":"AD/DHC-6/26 - Nose Landing Gear Fork Lock Pin - Inspection","slug":"ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115666,"registerId":"commonwealth-F2006B09113-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-6/26 - Nose Landing Gear Fork Lock Pin - 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)  DHC-6 (Twin Otter) Series Aeroplanes\n\n \n\nAD/DHC-6/26 Nose Landing Gear Fork Lock Pin - Inspection 5/71\n\nApplicability: All models.\n\n \n\nDocument: De Havilland of Canada SB No. 6/40.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1971.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1719},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a standalone airworthiness directive establishing the original requirement for nose landing gear fork lock pin inspections. It has not expanded beyond its initial aviation safety purpose."},"complexity_factors":["Single, unambiguous operational requirement","No defined terms or interpretation sections","No conditional logic or nested exceptions","Minimal cross-referencing (only to external service bulletin for technical specifications)"],"plain_english_summary":"This directive requires operators of De Havilland DHC-6 Twin Otter aircraft to perform a safety inspection on the **nose landing gear fork lock pin** — a critical component that helps secure the front wheel assembly.\n\n**Who it affects:** All owners and operators of DHC-6 Twin Otter series aeroplanes.\n\n**What must be done:** Inspect the lock pin according to the technical procedures outlined in De Havilland Service Bulletin No. 6/40.\n\n**When:** Within 100 hours of flight time (time in service) after 30 June 1971.\n\n**Why it matters:** The inspection ensures the nose landing gear mechanism remains mechanically sound and safe for flight operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection","history":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection/history","analysis":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection/analysis","conflicts":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection/conflicts","importantCases":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection/important-cases","documents":"/api/acts/ad-dhc-6-26-nose-landing-gear-fork-lock-pin-inspection/documents"}}