{"id":"F2006B08718","name":"AD/DART/5 - Reduction Gear Oil Seal","slug":"ad-dart-5-reduction-gear-oil-seal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51922,"registerId":"commonwealth-F2006B08718-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DART/5 - Reduction Gear Oil Seal","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Rolls Royce Turbine Engines - Dart Series\n\n \n\nAD/DART/5 Reduction Gear Oil Seal 11/87\n\nApplicability: Dart RDa-6, RDa-7 series engines.\n\n \n\nRequirement: 1. Action in accordance with Rolls Royce SB Da 72-360 Rev 1; or\n\n \n\n2. AD/RRT/14.\n\n \n\nCompliance: As detailed in Requirement Document. Background: Reissue of AD/RRT/14.\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":1227},"content_quality":"ok","complexity_score":2,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This instrument is explicitly a reissue of the previous AD/RRT/14 and maintains identical scope regarding reduction gear oil seals for the specified Dart engine models. No expansion or alteration of regulatory reach has occurred."},"complexity_factors":["Extremely short text (under 150 words) with minimal conditional logic","Complete reliance on externally incorporated technical documents (Rolls Royce Service Bulletin Da 72-360 Rev 1) for substantive requirements","Cross-reference to alternative compliance pathway (AD/RRT/14) without explanation of differences","Technical aviation terminology assumes familiarity with engine maintenance concepts"],"plain_english_summary":"This AD requires operators of Rolls‑Royce Dart RDa‑6 and RDa‑7 turboprop engines to follow Rolls‑Royce Service Bulletin Da 72‑360 (Rev 1) or the alternative AD/RRT/14 to address the reduction‑gear oil seal. It affects any aircraft fitted with those engines and matters because seal failure can cause loss of gearbox lubrication, engine shutdown or fire, so the directive ensures defective seals are identified and rectified."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dart-5-reduction-gear-oil-seal","history":"/api/acts/ad-dart-5-reduction-gear-oil-seal/history","analysis":"/api/acts/ad-dart-5-reduction-gear-oil-seal/analysis","conflicts":"/api/acts/ad-dart-5-reduction-gear-oil-seal/conflicts","importantCases":"/api/acts/ad-dart-5-reduction-gear-oil-seal/important-cases","documents":"/api/acts/ad-dart-5-reduction-gear-oil-seal/documents"}}