{"id":"F2009L04137","name":"CASA 527/09 - Approval - compliance with Airworthiness Directive (AD) for Hartzell Propellers","slug":"casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81765,"registerId":"commonwealth-F2009L04137-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 527/09 - Approval - compliance with Airworthiness Directive (AD) for Hartzell Propellers","content":"Instrument number CASA 527/09\n\nI, William David, Manager, Continuing Airworthiness, Standards Development and Future Technology Division, a delegate of CASA, make this instrument under paragraph 39.004 (3) (a) of the Civil Aviation Safety Regulations 1998.\n\n\\[Signed William David\\]\n\nWilliam David  \nManager, Continuing Airworthiness  \nStandards Development and Future Technology Division\n\n13 November 2009\n\nApproval — compliance with Airworthiness Directive (AD) for Hartzell Propellers\n\n1 Duration\n\nThis instrument:\n\n(a) commences on the day of registration; and\n\n(b) stops having effect if AD 2009-22-03, issued by the FAA, is amended or cancelled.\n\n2 Application\n\nThis instrument applies to a registered operator who operates an aircraft with Hartzell Propeller Inc. propellers mentioned in AD 2009-22-03.\n\n3 Approved means of compliance\n\nI approve, as a means of compliance with AD 2009-22-03, other than that set out in that AD, the following means of compliance:\n\n(a) for a propeller hub, mentioned in paragraph (d) of that AD and retired from service, compliance with AD/PHZL/75 instead of FAA AD 2003-01-03; and\n\n(b) for propellers mentioned in paragraph (f) of AD 2009-22-03, compliance with AD/PHZL/74, Amendment 1, instead of FAA AD 2001-23-08.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument maintains its original narrow scope. It was created specifically to approve alternative compliance methods for FAA AD 2009-22-03 regarding Hartzell propellers, and it does exactly that without expanding into broader regulatory territory."},"complexity_factors":["Very short instrument (approximately 250 words)","Only 3 operative sections (Duration, Application, Approved means of compliance)","Minimal defined terms (relies on external documents: AD 2009-22-03, AD/PHZL/75, AD/PHZL/74)","Simple conditional logic (only one expiry trigger: amendment/cancellation of the referenced FAA AD)","No nested exceptions or complex cross-referencing within the instrument itself","Single purpose: approval of alternative compliance methods for one specific technical issue"],"plain_english_summary":"This CASA approval lets Australian-registered aircraft operators comply with equivalent Australian airworthiness directives for certain Hartzell propellers instead of following the US FAA AD 2009-22-03. It affects operators of the specific Hartzell models covered by that FAA AD and removes the need to follow overlapping foreign requirements.  \n\nThe approval lapses if the FAA amends or cancels AD 2009-22-03."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change which propellers or operators are in scope; it only approves alternative means of compliance for the propellers already identified by FAA AD 2009-22-03. Its coverage is time‑linked to the FAA AD (it starts on registration and stops if the FAA AD is amended or cancelled) (Duration s1(a)–(b); Application s2; Approved means of compliance s3)."},"complexity_factors":["Dependency on the FAA AD lifecycle: the instrument ceases if FAA AD 2009-22-03 is amended or cancelled (Duration s1(b)).","Narrow applicability: applies only to registered operators operating aircraft with Hartzell propellers mentioned in FAA AD 2009-22-03 (Application s2).","Specific substitutions of compliance paths: approves AD/PHZL/75 in place of FAA AD 2003-01-03 for retired hubs, and AD/PHZL/74 Amendment 1 in place of FAA AD 2001-23-08 for other propellers (Approved means of compliance s3(a)–(b)).","Temporal trigger: instrument commences on the day of registration, creating an administrative timing condition (Duration s1(a)).","Administrative delegation: instrument is made by a CASA delegate under paragraph 39.004(3)(a), indicating delegated decision-making authority (instrument header).","Compliance obligation and economic incidence: the instrument directs which ADs satisfy the requirement, so the practical compliance actions and their costs fall on the registered operators required to follow the approved ADs (Application s2; Approved means of compliance s3)."],"plain_english_summary":"This instrument approves specified Australian Airworthiness Directives as acceptable alternatives to particular FAA Airworthiness Directives for certain Hartzell propellers, giving registered operators an approved local means of compliance. It takes effect on registration and stops if the referenced FAA AD is amended or cancelled. It applies only to registered operators who operate aircraft with the Hartzell propellers listed in FAA AD 2009-22-03, allowing those operators to follow the named AD/PHZL requirements instead of the listed FAA ADs."}},"importantCases":[],"_links":{"self":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers","history":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers/history","analysis":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers/analysis","conflicts":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers/conflicts","importantCases":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers/important-cases","documents":"/api/acts/casa-527-09-approval-compliance-with-airworthiness-directive-ad-for-hartzell-propellers/documents"}}