{"id":"F2011L00287","name":"11/1198 - Alternative Means of Compliance to FAA Airworthiness Directive 2009-26-11","slug":"11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":85544,"registerId":"commonwealth-F2011L00287-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"11/1198 - Alternative Means of Compliance to FAA Airworthiness Directive 2009-26-11","content":"![](image.001.png)Instrument Number 11/1198\n\nI, David Villiers, manager INITIAL Airworthiness, a delegate of CASA, make this instrument under regulation 39.004 (3) (a) of the Civil Aviation Safety Regulations 1998.\n\n![](image.002.png)\n\nDavid Villiers\n\nManager, Initial Airworthiness\n\nStandards Development and Future Technology Division\n\n17 February 2011\n\nAlternative Means of Compliance to FAA Airworthiness Directive 2009-26-11\n\n1 Duration\n\nThis instrument:\n\n(a) commences on the day of registration; and\n\n(b) stops having effect if FAA AD 2009-26-11, issued by the FAA, is amended or cancelled.\n\n2 Application\n\nThis instrument applies to a registered operator who operates an Ayres S2R series aircraft mentioned in FAA AD 2009-26-11.\n\n3 Approved Means of Compliance\n\nI approve, as an alternative means of compliance to FAA AD 2009-26-11, other than that set out in the AD, “Eddy Current Testing Procedure Ayres S2R Lower Spar Caps QP.97.21 (E) Issue 5, dated 4 February 2011”.\n\nEnd","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument changes the compliance options available under FAA AD 2009-26-11 for a defined group of operators. Instead of requiring only the method set out in the FAA AD, registered operators of Ayres S2R series aircraft mentioned in that FAA AD may use the specified Eddy Current Testing Procedure as an approved alternative (section 3). The change is narrowly scoped to those registered operators (section 2) and is time-limited: the approval ceases if the FAA AD is amended or cancelled (section 1(b))."},"complexity_factors":["Cross-reference to an external FAA Airworthiness Directive (FAA AD 2009-26-11) creates dependency on an external regulatory instrument (see section 1(b) and header).","Reference to a specific technical procedure document (Eddy Current Testing Procedure QP.97.21 (E) Issue 5, dated 4 February 2011) requires operators to obtain and apply an external technical standard (section 3).","Temporal conditionality: the instrument commences on registration but automatically ceases if the FAA AD is amended or cancelled (section 1).","Delegated administrative action: the instrument is made by a CASA delegate under a specific regulation, introducing an element of administrative discretion (header).","Narrow, targeted scope limited to registered operators of a particular aircraft series (Ayres S2R), which simplifies application but requires checking aircraft registration and AD applicability (section 2)."],"plain_english_summary":"A CASA delegate has approved a specific Eddy Current Testing Procedure as an alternative means of complying with FAA AD 2009‑26‑11 for registered operators of the Ayres S2R series named in that AD. This lets those operators choose the approved procedure instead of the AD’s method, shifting inspection practice and costs onto them; the approval lapses if the FAA AD is amended or cancelled."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument remains tightly scoped to its original purpose: providing an alternative compliance method for one specific FAA airworthiness directive affecting one specific aircraft series. There is no evidence of scope creep."},"complexity_factors":["Very short document (only 3 operative sections plus preamble)","Only one defined term implicitly referenced (FAA AD 2009-26-11)","No cross-references to other legislation beyond the enabling regulation","Simple conditional duration clause (ceases if US directive amended/cancelled)","Single purpose instrument with no exceptions or nested conditions","Technical content limited to naming one specific technical procedure"],"plain_english_summary":"This is a technical aviation safety approval issued by CASA (the Civil Aviation Safety Authority). It gives aircraft operators a different way to comply with an American safety rule.\n\n**What it does:**\nNormally, Australian operators of Ayres S2R agricultural aircraft must follow a specific US Federal Aviation Administration (FAA) safety directive (AD 2009-26-11) about inspecting the wing structure. This instrument says operators can use an alternative inspection method — a specific eddy current testing procedure — instead of what the US directive requires.\n\n**Who it affects:**\n- Registered operators of Ayres S2R series aircraft (these are crop-dusting/agricultural planes)\n- Specifically those who need to comply with FAA Airworthiness Directive 2009-26-11\n\n**Why it matters:**\nAirworthiness directives are mandatory safety fixes. Without this approval, operators would be stuck with the original US method. This gives them a CASA-approved Australian alternative that presumably is more practical or available locally, while still ensuring the aircraft are safe to fly.\n\n**Key details:**\n- **Duration:** Starts immediately when registered; automatically ends if the US FAA changes or cancels their original directive\n- **Alternative method:** \"Eddy Current Testing Procedure Ayres S2R Lower Spar Caps QP.97.21 (E) Issue 5, dated 4 February 2011\" (a specific technical inspection document)\n- **Legal basis:** Made under Civil Aviation Safety Regulations 1998, regulation 39.004(3)(a)"}},"importantCases":[],"_links":{"self":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11","history":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11/history","analysis":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11/analysis","conflicts":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11/conflicts","importantCases":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11/important-cases","documents":"/api/acts/11-1198-alternative-means-of-compliance-to-faa-airworthiness-directive-2009-26-11/documents"}}