{"id":"F2013L01597","name":"AD/TSA-600/38 Amdt 2 - Fatigue Critical Components - Retirement Lives","slug":"ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":91401,"registerId":"commonwealth-F2013L01597-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TSA-600/38 Amdt 2 - Fatigue Critical Components - Retirement Lives","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: AIRCRAFT\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below repeals Airworthiness Directive (AD) AD/TSA-600/38 Amdt 1 and issues the following AD under subregulation 39.001(1) of CASR 1998 and subsection 33 (3) of the Acts Interpretation Act 1901. 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 aircraft or 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.\n\n| AD/TSA-600/38 Amdt 2 | Fatigue Critical Components - Retirement Lives | 17/2013 |\n| --- | --- | --- |\n\n\n \n\n| Applicability: | This AD applies to each Ted Smith Aerostar, Piper Aerostar or Aerostar Aircraft model 600, 601, 601P or 602P aeroplane (the aircraft) with:<br>(a) a Machen-modified Lycoming IO-540 or TIO-540 series engine; and<br>(b) a Hartzell HC-C4YR-2/FC6660 (B, K) or HC-C4YR-2L/FJC6660 (B, K) propeller blade (the propeller blade). |\n| --- | --- |\n| Requirement: | The registered operator of the aircraft must ensure that the propeller blade is retired from service. |\n| Compliance: | The propeller blade must be retired from service at or before 10 500 hours component time in service. |\n|  | This Amendment becomes effective on 21 August 2013. |\n| Background: | Hartzell Propeller Owner’s Manual No. 115N, Airworthiness Limitations refers to the mandatory propeller blade retirement life for the propeller and engine combination to which this AD applies. Associated hub parts are not affected.<br>The original issue of this AD established propeller blade life limits for Machen installations. It also incorporated the component retirement requirements of  AD/TSA-600/3.<br>Amendment 1 expanded the requirements of the AD to apply window and windshield life limits to all pressurised Aerostar models.<br>Amendment 2 removes the requirement relating to windshield and window life limits. The requirements for windshield and window retirement are contained in the aircraft airworthiness limitations (AWL). Subsection 9 of Civil Aviation Order 100.5 (General requirements in respect of maintenance of Australian aircraft) 2011 directs the registered operator of an Australian aircraft to comply with AWL.<br>The requirement 2 relating to the propeller life limit is retained unchanged. |\n\n\n![](image.001.png)\n\nCharles Lenarcic  Delegate of the Civil Aviation Safety Authority\n\n19 August 2013\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 narrows the AD’s scope by removing the windshield/window retirement-life requirement that Amendment 1 had added; the propeller blade retirement requirement (10,500 hours) is retained unchanged. Responsibility for windshield/window limits is redirected to the aircraft Airworthiness Limitations (AWL) framework under Civil Aviation Order 100.5."},"complexity_factors":["Narrow technical applicability (specific Aerostar models, specific Machen‑modified engines, and specific Hartzell blade part numbers)","Single clear compliance requirement (retire blades at/before 10,500 hours) which lowers legal complexity","Cross‑references to external documents (Hartzell Owner’s Manual No. 115N and aircraft Airworthiness Limitations) that require operators to consult other sources","Interaction with Civil Aviation Order 100.5: operator duty to follow AWL creates regulatory layering","Amendment history (removal of windshield/window limits) requires checking prior ADs to understand scope changes","Practical compliance burdens: tracking component time-in-service and scheduling replacements impose operational and cost planning requirements"],"plain_english_summary":"This Airworthiness Directive requires registered operators of Ted Smith/Piper Aerostar 600/601/601P/602P aeroplanes fitted with Machen‑modified Lycoming IO‑540/TIO‑540 engines and the listed Hartzell propeller blades to retire those blades at or before 10,500 hours component time in service. It removes a prior requirement on windshield/window retirement; associated hub parts are not affected.\n\nWho pays and acts: the aircraft's registered operator must track component hours and pay for blade replacement; the CASA delegate issues the requirement. Operators must schedule removals by the hour limit, increasing maintenance planning and replacement costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The legislation has narrowed in scope compared to its immediate predecessor. Amendment 1 expanded the AD to include windshield and window life limits for all pressurised Aerostar models. Amendment 2 removes those requirements, returning the AD to its original focus on propeller blade retirement only. The windshield/window requirements still exist but have been relocated to the aircraft's Airworthiness Limitations section, which operators must follow under separate regulations (CAO 100.5). This represents a 'scope correction' — removing overlapping requirements rather than expanding authority."},"complexity_factors":["Single, specific mechanical requirement (propeller blade retirement at fixed hour limit)","Narrow applicability limited to specific aircraft models, engine modifications, and propeller part numbers","No nested exceptions or conditional logic — compliance is absolute and time-based only","Minimal cross-referencing (only cites enabling regulations CASR 1998 and Acts Interpretation Act 1901, plus background reference to Hartzell manual)","Clear, tabular format with distinct sections (Applicability, Requirement, Compliance, Background)","Background section explains amendment history in plain language rather than legal code"],"plain_english_summary":"This Airworthiness Directive from CASA mandates permanent retirement of certain Hartzell propeller blades on specific twin‑engine Aerostar aircraft once a blade reaches 10,500 component hours, to prevent fatigue‑related failure. \n\nIt applies to owners/operators of Aerostar 600/601/601P/602P aircraft with Machen‑modified Lycoming IO‑540/TIO‑540 engines fitted with the listed propeller blades. Amendment 2 removes prior windshield/window life‑limit text but leaves the blade retirement unchanged."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives","history":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives/history","analysis":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives/analysis","conflicts":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives/conflicts","importantCases":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives/important-cases","documents":"/api/acts/ad-tsa-600-38-amdt-2-fatigue-critical-components-retirement-lives/documents"}}