{"id":"F2006B06678","name":"AD/RRP-C/3 - Crankshaft - Inspection","slug":"ad-rrp-c-3-crankshaft-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48676,"registerId":"commonwealth-F2006B06678-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RRP-C/3 - Crankshaft - 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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Rolls Royce (Blackburn) Engines - Cirrus Series\n\n \n\nAD/RRP-C/3 Crankshaft - Inspection NK\n\nApplicability: Cirrus Minor 11 engines S/N 4769 and below. Document:  1. Cirrus Service Instruction J14; or\n\n2. ANO 106.1.4.1.6.1.; or\n\n \n\n3. AD/BNC/3.\n\n \n\nCompliance: Before installation in an aircraft following next overhaul completed after 1 July 1962.\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":2284},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive retains its original narrow, technical scope—a targeted safety requirement for a specific production run of piston engines manufactured decades ago. It has not expanded beyond its initial remedial purpose."},"complexity_factors":["Single mechanical requirement limited to one engine component (crankshaft inspection)","Narrow applicability restricted to specific engine model and serial number cutoff (S/N 4769)","Three alternative technical reference documents offering equivalent compliance pathways","Simple temporal compliance trigger (post-1 July 1962 overhaul)","No defined terms section or conditional logic beyond basic applicability"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order issued by the aviation regulator) requiring inspection of crankshafts in specific vintage aircraft engines.\n\n**Who it affects:**\nOwners and operators of aircraft powered by **Cirrus Minor II engines** (written as \"11\" in the original document) with serial numbers **4769 and below**.\n\n**What it requires:**\nBefore installing one of these engines into an aircraft following its next major service (overhaul), you must inspect the crankshaft. This only applies if the overhaul is completed after **1 July 1962**.\n\n**How to comply:**\nThe inspection must follow one of three technical manuals:\n- **Cirrus Service Instruction J14**, or\n- **ANO 106.1.4.1.6.1**, or  \n- **Airworthiness Directive AD/BNC/3**.\n\nThis ensures potentially faulty crankshafts in older engines are identified before the engine returns to service."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rrp-c-3-crankshaft-inspection","history":"/api/acts/ad-rrp-c-3-crankshaft-inspection/history","analysis":"/api/acts/ad-rrp-c-3-crankshaft-inspection/analysis","conflicts":"/api/acts/ad-rrp-c-3-crankshaft-inspection/conflicts","importantCases":"/api/acts/ad-rrp-c-3-crankshaft-inspection/important-cases","documents":"/api/acts/ad-rrp-c-3-crankshaft-inspection/documents"}}