{"id":"F2006B02041","name":"AD/AA-5/1 - Rudder Control - Spring Replacement","slug":"ad-aa-5-1-rudder-control-spring-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41263,"registerId":"commonwealth-F2006B02041-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-5/1 - Rudder Control - Spring Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue NK,Aircraft below 5700 kg,Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes,Rudder Control - Spring Replacement,1\ntitle: Airworthiness Directive - AD/AA-5/1 - Rudder Control - Spring Replacement\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)  Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes\n\n \n\nAD/AA-5/1 Rudder Control - Spring Replacement NK\n\nApplicability: All models.\n\n \n\nDocument: American Aviation SB No. 131.\n\n \n\nCompliance: For aircraft with more than 1000 hours total time in service as at 25 July 1972 - within 50 hours’ time in service after 25 July 1972 and thereafter at intervals not exceeding 1000 hours’ time in service. For aircraft with less than 1000 hours total time in service - before achieving 1000 hours total time in service and thereafter at intervals not exceeding 1000 hours’ time in service.\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 discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft series. It has not expanded beyond its original purpose of mandating rudder spring replacement."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly used ('time in service' — flight hours)","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple binary applicability split based on a single threshold (1000 hours as at 25 July 1972)","Straightforward compliance schedule with only two conditional branches","Single technical reference to external document (Service Bulletin No. 131)"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of Gulfstream AA‑5 (Grumman/American) aeroplanes to replace a spring in the rudder control system on a recurring hour‑based schedule tied to aircraft hours as of 25 July 1972 (initial compliance at or before 1,000 hours, then every 1,000 hours; different initial windows for high‑ and low‑time aircraft). \n\nThe change prevents rudder spring failure and potential loss of directional control; follow American Aviation Service Bulletin No. 131 for the technical procedure."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive prescribes a maintenance action for all AA-5 models; the text does not indicate any alteration (broadening or narrowing) of regulatory scope compared with prior material. It establishes specific initial and recurring service-hour intervals but contains no statement that it modifies an earlier scope."},"complexity_factors":["Single-component requirement (rudder-control spring) keeps technical scope narrow","Uniform applicability to all AA-5 models simplifies coverage","Two-tier initial compliance tied to a historical date (25 July 1972) introduces record-keeping sensitivity","Simple recurring interval (every 1,000 hours) reduces scheduling complexity","Relies on external document (American Aviation SB No. 131) for technical procedure","No alternative compliance methods, exemptions, or administrative procedures set out in the text"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Gulfstream (Grumman American/American Aviation) AA‑5 series aeroplanes to replace the rudder-control spring in accordance with American Aviation Service Bulletin No. 131. It applies to all models and prescribes initial and recurring replacement intervals: aircraft with more than 1,000 total hours as at 25 July 1972 must comply within 50 hours after that date and then every 1,000 hours; those with less than 1,000 hours must comply before reaching 1,000 hours and thereafter every 1,000 hours. The Civil Aviation Safety Authority issues and enforces the requirement under Part 39."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement","history":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement/history","analysis":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement/analysis","conflicts":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement/conflicts","importantCases":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement/important-cases","documents":"/api/acts/ad-aa-5-1-rudder-control-spring-replacement/documents"}}