{"id":"F2006B06621","name":"AD/ROBIN/23 - Anti-Tab Control","slug":"ad-robin-23-anti-tab-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48484,"registerId":"commonwealth-F2006B06621-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ROBIN/23 - Anti-Tab Control","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)  Robin Aviation Series Aeroplanes\n\n \n\nAD/ROBIN/23 Anti-Tab Control 7/95\n\nApplicability: All Model R 2000 and HR 200 aircraft, serial numbers 250 through 271. Requirement:               Action in accordance with Avions Pierre Robin Mandatory Service Bulletin 137.\n\nNote: DGAC AD 94-183(A)R1 refers.\n\n \n\nCompliance: Unless already accomplished, within 100 hours time in service after 22 June 1995.\n\n \n\nBackground: The DGAC requires installation of a friction lock device on the sliding stop tube in order to improve the operating condition of the anti-tab control.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific technical modification for a limited fleet of aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (model numbers and serial number range)","Single, unambiguous compliance requirement referencing an external technical document","No nested exceptions, conditional logic, or cross-references to other legislation","Straightforward deadline calculation (100 hours time in service from fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for specific Robin Aviation aeroplanes.\n\n**What it does:**\nIt requires owners or operators of certain Robin R 2000 and HR 200 aircraft (serial numbers 250–271) to install a **friction lock device** on the sliding stop tube of the anti-tab control system. This is a safety modification to improve how the anti-tab control operates.\n\n**Who must comply:**\nAnyone who owns or operates the affected aircraft models within Australian airspace.\n\n**What action is required:**\nFollow the instructions in **Avions Pierre Robin Mandatory Service Bulletin 137** (a technical notice from the aircraft manufacturer). This must be done within **100 hours of flight time** after 22 June 1995, unless already completed.\n\n**Why it matters:**\nThe French aviation authority (DGAC) identified a safety issue with the anti-tab control system. Without this fix, the control might not operate properly, potentially affecting aircraft handling and safety. This directive ensures Australian-registered aircraft meet the same safety standard."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies to the specific set of aircraft (Model R 2000 and HR 200, serial numbers 250–271) and requires a specified retrofit per the manufacturer’s service bulletin within a stated time window. The text contains no indication that the instrument’s scope was expanded or narrowed from its original stated requirement (Applicability; Requirement; Compliance; Background; Note)."},"complexity_factors":["Narrow applicability by model and serial numbers (Applicability).","Technical action delegated to an external document (Avions Pierre Robin Mandatory Service Bulletin 137) rather than detailed in the AD (Requirement).","Fixed compliance window tied to hours-in-service after a calendar date (Compliance).","Cross-reference to a foreign regulator’s AD (DGAC) for origin of requirement (Note/Background).","Lack of quantified cost/benefit or inspection/verification steps in the AD text (Background/Requirement)."],"plain_english_summary":"This AD requires owners/operators of Avions Pierre Robin R2000 and HR200 aeroplanes (S/N 250–271) to install a friction lock on the anti‑tab sliding stop tube per Mandatory Service Bulletin 137 within 100 flight hours of 22 June 1995. Maintenance organisations must carry out the work to the manufacturer’s method.\n\nIt shifts parts, labour and downtime costs to owners/operators in exchange for an asserted (unquantified) improvement in anti‑tab control operation; the CAA enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-robin-23-anti-tab-control","history":"/api/acts/ad-robin-23-anti-tab-control/history","analysis":"/api/acts/ad-robin-23-anti-tab-control/analysis","conflicts":"/api/acts/ad-robin-23-anti-tab-control/conflicts","importantCases":"/api/acts/ad-robin-23-anti-tab-control/important-cases","documents":"/api/acts/ad-robin-23-anti-tab-control/documents"}}