{"id":"F2006B10786","name":"AD/IAI-W/11 - Elevator and Rudder Servo Installation","slug":"ad-iai-w-11-elevator-and-rudder-servo-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56249,"registerId":"commonwealth-F2006B10786-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/IAI-W/11 - Elevator and Rudder Servo Installation","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)  Israel Aircraft Industries 1123 and 1124 (Westwind) Series Aeroplanes\n\n \n\nAD/IAI-W/11 Elevator and Rudder Servo Installation 5/86\n\nApplicability: Model 1124 and 1124A Westwinds, all serial numbers prior to 437 except 418, 423, 426, 429, 431, 432 and 435.\n\n \n\nRequirement: Action in accordance with 1124 Westwind Service Bulletin No 1124-22-072. Compliance:               Within 100 hours time in service after 31 May 1986.\n\nBackground: The manufacturer has identified the possibility of elevator and/or rudder control interference with existing hardware.\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1986 addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating a particular safety modification."},"complexity_factors":["Single, specific applicability clause (one aircraft type, specific serial number range with explicit exclusions)","Single requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline (100 hours time in service after fixed date)","No defined terms section, no cross-references to other legislation, no conditional logic or nested exceptions","Extremely short document (approximately 100 words of substantive content)"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Israel Aircraft Industries Westwind business jets** (specifically Model 1124 and 1124A with serial numbers below 437, excluding a handful of specific aircraft) to carry out a safety inspection and modification.\n\n**The safety issue:**\nThe manufacturer discovered that elevator and/or rudder controls could physically interfere with existing hardware in the aircraft — a potentially dangerous situation that could affect the pilot's ability to control the plane.\n\n**What must be done:**\nOperators must follow the instructions in **Service Bulletin No 1124-22-072** (a technical document from the manufacturer detailing the fix) within **100 hours of flying time** after 31 May 1986.\n\n**Who it affects:**\nAnyone operating the specified Westwind aircraft in Australia — typically charter companies, corporate flight departments, or private owners of these business jets.\n\n**Why it matters:**\nFlight control interference can lead to loss of aircraft control. This AD ensures a known mechanical defect is fixed before it causes an accident. Non-compliance means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with the stated problem in the instrument: it targets the subset of Westwind aeroplanes that the manufacturer identified as at risk and mandates the manufacturer’s corrective procedure within a fixed compliance window. The AD does not expand the affected population beyond the serial-number list provided, nor does it add requirements beyond following Service Bulletin No 1124-22-072 within the specified timeframe (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow and clearly defined applicability (Model 1124 and 1124A, specified serial numbers with an explicit small exclusion list). (Applicability)","Single, external technical directive to follow (Service Bulletin No 1124-22-072) rather than a set of technical measures laid out in the AD itself. (Requirement)","Short, fixed compliance timeframe tied to a specific date and a clear hours-in-service threshold. (Compliance)","No detailed procedural options, exceptions, or conditional pathways included in the text — obligation is binary (do the bulletin or be non-compliant). (Requirement; Compliance)"],"plain_english_summary":"This airworthiness directive makes compliance with Israel Aircraft Industries Service Bulletin No 1124-22-072 mandatory for certain Westwind Model 1124/1124A aeroplanes (specified serial numbers) within 100 hours after 31 May 1986.  \n\nIt targets owners/operators who must pay for and schedule the installation to address a manufacturer-identified risk of elevator/rudder control interference, converting elective maintenance into a regulatory requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation","history":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation/history","analysis":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation/analysis","conflicts":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation/conflicts","importantCases":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation/important-cases","documents":"/api/acts/ad-iai-w-11-elevator-and-rudder-servo-installation/documents"}}