{"id":"F2006B06426","name":"AD/R22/20 - Push Pull Tubes and Guides - Inspection and Modification","slug":"ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47807,"registerId":"commonwealth-F2006B06426-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/20 - Push Pull Tubes and Guides - Inspection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)  Robinson R22 Series Helicopters\n\n \n\n# AD/R22/20 Push Pull Tubes and Guides - Inspection\n\nand Modification\n\nApplicability: All R22 models with serial numbers 0002 through 0369.\n\n# 2/84\n\n \n\nRequirement: Part 1 With the aid of a small mirror and high intensity light, visually and carefully inspect the A121-7 vertical push pull tubes for wear in the area of the blue guide bushings. Also check for evidence of movement of the blue bushings in their mount causing fretting and deterioration of guides. Push pull tube wear between .005 and\n\n.015 inch per side is acceptable.\n\n \n\nIf a tube is worn over .015 inch per side or the blue bushing is wearing through housing, replace tube, guide and bushings as applicable before further flight.\n\n \n\nPart 2 Install protective sleeve and guides as per RHC SB No. 36.\n\n \n\nCompliance: Part 1 Within 25 hours time in service after 28 December 1983.\n\n \n\nPart 2 Within 100 hours time in service after 31 January 1984.\n\n \n\nBackground: The manufacturer advises that excessive wear of the vertical push pull tubes forward of the main rotor gearbox has been reported, consequently a protective sleeve and adjustable guide have been developed to nullify this problem.\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":2029},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original, narrow scope addressing specific mechanical wear in early Robinson R22 helicopters. There is no evidence of scope expansion beyond the original safety issue described in the background."},"complexity_factors":["Short, single-page directive with only two distinct compliance parts","Clear numerical wear thresholds (0.005 inch and 0.015 inch) with simple pass/fail logic","Single external reference to manufacturer service bulletin (RHC SB No. 36)","Narrow applicability limited to specific serial number range (0002-0369)","Minimal legal terminology; primarily mechanical/technical instructions"],"plain_english_summary":"Owners and operators of early Robinson R22 helicopters (S/N 0002–0369) must inspect the vertical push‑pull tubes and guide bushings for wear and replace parts that exceed limits, and install a protective sleeve and new guides per the manufacturer’s service bulletin. \n\nThe rule prevents excessive fretting near the main rotor gearbox that could lead to flight control failure, preserving safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification","history":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification/history","analysis":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification/analysis","conflicts":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification/important-cases","documents":"/api/acts/ad-r22-20-push-pull-tubes-and-guides-inspection-and-modification/documents"}}