{"id":"F2006B09131","name":"AD/DHC-6/42 - Inboard Trailing Flap - Inspection and Modification","slug":"ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115684,"registerId":"commonwealth-F2006B09131-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-6/42 - Inboard Trailing Flap - Inspection and Modification","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-6/42 Inboard Trailing Flap - Inspection and Modification 6/76\n\nApplicability: All models with S/Nos. 1 to 510. Document:  De Havilland of Canada SB No. 6/345. Compliance:               As detailed in the requirement document.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1604},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, targeted scope focused exclusively on inspection and modification of inboard trailing flaps for a specific range of DHC-6 aircraft serial numbers (1-510). It does not extend beyond this specific airworthiness maintenance requirement."},"complexity_factors":["Defers all substantive requirements to an external technical document (Service Bulletin 6/345) which is not reproduced in the directive","Requires specialized aviation technical knowledge to interpret terms like 'inboard trailing flap' and airworthiness compliance","Depends on Civil Aviation Regulations Part 39 for its enforcement framework"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of De Havilland Canada DHC-6 Twin Otter aircraft (serials 1–510) to inspect and modify the inboard trailing flaps per De Havilland Service Bulletin No. 6/345. Issued by the Civil Aviation Safety Authority, compliance is compulsory for legal flight because it addresses a specific flap-system safety issue that could affect the aircraft’s airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification","history":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification/history","analysis":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification/analysis","conflicts":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification/important-cases","documents":"/api/acts/ad-dhc-6-42-inboard-trailing-flap-inspection-and-modification/documents"}}