{"id":"F2006B11115","name":"AD/LEARJET 35/36 - Spoiler Actuators","slug":"ad-learjet-35-36-spoiler-actuators","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56779,"registerId":"commonwealth-F2006B11115-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/LEARJET 35/36 Spoiler Actuators 3/200","sectionType":"part","heading":"AD/LEARJET 35/36 Spoiler Actuators 3/2000 DM","content":"# AD/LEARJET 35/36 Spoiler Actuators 3/2000 DM\n\nApplicability: Model 35 and 35A aeroplanes, serial numbers 35-065, 35-242, 35-300, 35-323, 35-\n\n447, 35-622 and 35-670.\n\nRequirement: Determine by visual inspection the serial number of the installed spoiler actuators and if the serial number is listed in Learjet Service Bulletin SB 35-27-36, dated 14 December 1998 replace the spoiler actuator with a new actuator in accordance with the service bulletin.\n\nNote: FAA AD 99-23-19 refers.\n\nCompliance: Within 150 flight hours after the effective date of this AD.\n\nThis Airworthiness Directive becomes effective on 27 January 2000.\n\nBackground: Failure of a spoiler actuator has occurred which could result in the spoiler panel floating and inducing an uncommanded roll of the aeroplane.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 20 January 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 27 January 2000.","sortOrder":1}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical failure in a small number of aircraft. It remains tightly scoped to its original purpose with no evidence of scope creep."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 defined applicability criteria (model type and 7 specific serial numbers)","Single requirement with straightforward conditional logic (inspect → if match → replace)","No cross-references to other legislation beyond a single note referencing the equivalent FAA directive","Simple compliance timeframe (150 flight hours from effective date)","No nested exceptions or conditional sub-clauses"],"plain_english_summary":"This CASA safety order applies to seven specific Learjet 35/35A aircraft identified by serial number and addresses a known failure of spoiler actuators that can let a spoiler “float” and cause unexpected roll. Owners/operators must visually check actuator serial numbers and, if they match those listed in Learjet SB 35-27-36 (Dec 1998), replace the actuator per the bulletin within 150 flight hours after 27 Jan 2000 to prevent potential loss of control."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD is narrowly targeted to specified Learjet 35/35A serial-numbered aeroplanes and requires replacement only where serial numbers match those listed in the referenced Service Bulletin. There is no indication in the instrument that the applicability or corrective scope was expanded beyond that targeted set of aircraft or the stated corrective action."},"complexity_factors":["Narrow applicability to specific airframe models and a finite list of serial numbers (Applicability) — simplifies identification but requires serial-number checks.","Identification by visual inspection of serial numbers (Requirement) — low technical complexity but relies on maintenance access and record accuracy.","Mandated replacement if serial number appears in the manufacturer's Service Bulletin and work must follow that bulletin (Requirement) — operators must obtain and follow SB 35-27-36 (14 Dec 1998).","Fixed short compliance window of 150 flight hours from the AD's effective date (Compliance) — creates scheduling and potential operational disruption for affected operators.","Reference to related FAA AD (Note) — may require cross-checking international directives and records.","Safety risk prompting the AD is concrete and operational (Background) — actuator failure can cause spoiler float and uncommanded roll, motivating mandatory action.","Regulatory authority and mandatory nature derive from CASA delegate action under subregulation 39.1(1) of CAR 1998 (preamble) — discretionary regulatory power used to impose compliance."],"plain_english_summary":"This Airworthiness Directive requires operators of specific Learjet 35/35A aeroplanes (listed serial numbers) to visually inspect installed spoiler actuator serial numbers and, if those numbers appear in Learjet Service Bulletin SB 35-27-36 (14 Dec 1998), replace the actuator in accordance with that bulletin within 150 flight hours. It affects the listed aircraft owners/operators and matters because a failed spoiler actuator can let a spoiler panel float and induce an uncommanded roll (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-36-spoiler-actuators","history":"/api/acts/ad-learjet-35-36-spoiler-actuators/history","analysis":"/api/acts/ad-learjet-35-36-spoiler-actuators/analysis","conflicts":"/api/acts/ad-learjet-35-36-spoiler-actuators/conflicts","importantCases":"/api/acts/ad-learjet-35-36-spoiler-actuators/important-cases","documents":"/api/acts/ad-learjet-35-36-spoiler-actuators/documents"}}