{"id":"F2006B10337","name":"AD/GY80/6 - Aileron and Elevator Control Gimbal Joints - Inspection","slug":"ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56093,"registerId":"commonwealth-F2006B10337-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GY80/6 - Aileron and Elevator Control Gimbal Joints - 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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aerospatiale GY 80 (Horizon) Series Aeroplanes\n\n \n\nAD/GY80/6 Aileron and Elevator Control Gimbal Joints - Inspection\n\n\n3/74\n\n \n\nApplicability: All models.\n\n \n\nDocument: Sud Aviation SB No. 35.\n\n \n\nCompliance: Within 100 hours time in service after 30 April 1974.\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive imposes a specific inspection requirement limited to aileron and elevator control gimbal joints on Aerospatiale GY 80 series aeroplanes and sets a fixed compliance timeframe; the text does not indicate an expansion or contraction of scope beyond that inspection obligation. The document delegates procedural detail to Sud Aviation SB No. 35 but does not alter the set of aircraft or the action required (Applicability; Document; Compliance)."},"complexity_factors":["Short, narrowly focused requirement: single inspection of specific flight‑control joints (AD title).","Fixed, short compliance window tied to a historical date (100 hours after 30 April 1974) creates a clear but time‑limited obligation (Compliance).","Procedural dependence on an external document (Sud Aviation SB No. 35) for inspection method and details increases interpretive reliance on that bulletin (Document).","No procedural detail, recurrence interval, or enforcement/record‑keeping provisions included in the text, requiring reference to other materials or regulator practice (Compliance; header).","Applicability states 'All models' without serial or configuration qualifiers, which is broad but simple to apply (Applicability)."],"plain_english_summary":"What this instrument does (mechanical change)\n\n- Requires an inspection of the aileron and elevator control gimbal joints on Aerospatiale GY 80 (Horizon) series aeroplanes. (AD/GY80/6 title)\n- The inspection must be carried out in accordance with Sud Aviation Service Bulletin No. 35. (Document: Sud Aviation SB No. 35)\n- The inspection must be completed within 100 hours time in service after 30 April 1974. (Compliance: Within 100 hours time in service after 30 April 1974)\n\nWho is affected\n\n- Owners and operators of Aerospatiale GY 80 (Horizon) series aeroplanes, all models. (Applicability: All models)\n- Maintenance personnel and organisations who perform inspections and repairs to these aircraft, because the directive references a manufacturer service bulletin for the inspection procedure. (Document: Sud Aviation SB No. 35)\n\nWhy it matters (official rationale and practical effects)\n\n- The document directs a specific safety inspection of primary flight‑control joints. The stated operational effect is a mandatory inspection within a fixed time window; the text does not itself state the safety evidence or incident that prompted the inspection. (AD/GY80/6 title; Compliance)\n\nCosts, incentives and trade‑offs\n\n- Who pays: the owner/operator bears the direct cost of arranging and performing the inspection (Compliance). That cost includes labour, any replacement parts found necessary, and aircraft downtime while the inspection or repairs are performed.\n- Compliance burden: the directive ties the inspection procedure to Sud Aviation SB No. 35. Relying on a manufacturer service bulletin can increase administrative and technical burdens because compliance requires following that external document; it may also specify parts, methods or authorised personnel. (Document)\n- Opportunity cost and downtime: aircraft removed from service for inspection lose operating hours that could otherwise generate revenue. The directive specifies a one‑time compliance window rather than a recurring interval, so immediate downtime is the principal operational cost. (Compliance)\n- Effects on independent providers: independent maintenance organisations can perform the inspection if they follow the referenced service bulletin. The directive itself does not limit who may carry out the work, but following the manufacturer’s procedures may affect the specific skills, tools or parts required. (Document)\n\nImplementation and enforcement\n\n- The directive is listed under the Civil Aviation Safety Authority schedule of airworthiness directives; the regulator issues the requirement and enforces compliance as part of its airworthiness oversight. The text does not set out penalties or record‑keeping requirements. (COMMONWEALTH OF AUSTRALIA ... CIVIL AVIATION SAFETY AUTHORITY; SCHEDULE OF AIRWORTHINESS DIRECTIVES)\n- The directive specifies only the action (inspect) and the timeframe; procedural detail is delegated to the referenced Sud Aviation service bulletin, creating reliance on that external document for execution. (Document)\n\nPractical uncertainties and risks\n\n- The directive does not state whether the inspection is a one‑off or whether follow‑up inspections are required; operators must consult Sud Aviation SB No. 35 and regulator guidance to determine any further action. (Compliance; Document)\n- The fixed compliance date window (100 hours after 30 April 1974) creates a clear deadline but may raise interpretive questions for aircraft that were beyond that window at the time of issuance or for restoration projects; the AD text itself does not address late compliance or recordation. (Compliance)\n\nSummary in one sentence\n\n- All Aerospatiale GY 80 (Horizon) aeroplanes must have their aileron and elevator control gimbal joints inspected according to Sud Aviation SB No. 35 within 100 hours time in service after 30 April 1974; owners/operators pay for and arrange the inspection, and the regulator lists it as a mandatory airworthiness directive. (Applicability; Document; Compliance)"},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a historical Airworthiness Directive from 1974. As a standalone AD, it represents the original scope: a targeted safety inspection for a specific aircraft type. There is no evidence of scope creep as this is a discrete regulatory instrument rather than an evolving legislative scheme."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple unconditional directive: inspect specific components by specific deadline","Single applicability criterion (all models of one aircraft type)","References only one external technical document (Sud Aviation SB No. 35)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft: the **Aerospatiale GY 80 (Horizon) series**.\n\n**What it does:**\nIt requires owners and operators of these aircraft to **inspect the gimbal joints** in the aileron and elevator control systems. Gimbal joints are mechanical pivot points that allow control surfaces (the parts of the wing and tail that steer the plane) to move smoothly.\n\n**Who it affects:**\nAnyone who owns or operates any model of the Aerospatiale GY 80 aircraft.\n\n**Why it matters:**\nThese inspections are mandatory safety requirements. They ensure that critical flight control components are not worn, damaged, or likely to fail. If the gimbal joints fail in flight, the pilot could lose control of the aircraft's roll (aileron) or pitch (elevator), potentially causing a crash.\n\n**When it had to be done:**\nOperators had to complete this inspection within **100 hours of flight time** after 30 April 1974. This was a one-time compliance requirement tied to a specific Service Bulletin (technical notice) from the manufacturer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection","history":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection/history","analysis":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection/analysis","conflicts":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection/conflicts","importantCases":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection/important-cases","documents":"/api/acts/ad-gy80-6-aileron-and-elevator-control-gimbal-joints-inspection/documents"}}