{"id":"F2006B06318","name":"AD/PR/2 Amdt 1 - Propeller Blade - Rework","slug":"ad-pr-2-amdt-1-propeller-blade-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47455,"registerId":"commonwealth-F2006B06318-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PR/2 Amdt 1 - Propeller Blade - Rework","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propellers - Variable Pitch - Dowty Rotol\n\n \n\nAD/PR/2\n\nAmdt 1\n\n\nPropeller Blade - Rework NK\n\n \n\nApplicability: As detailed in the requirement document. Document: 1. Dowty Rotol SB No. 61-266; or\n\n2.    Dowty Rotol SB No. 61-266B; or\n\n \n\n3.    Dowty Rotol SB No. 61-266C; or\n\n \n\n4.    Dowty Rotol SB No. 61-266D; or\n\n \n\n5.    Dowty Rotol SB No. 61-266E. Compliance: As detailed in the requirement document.\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":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This entry is marked as an amendment (Amdt 1). The AD now specifies compliance by reference to a requirement document and lists multiple revisions of Dowty Rotol Service Bulletin No. 61-266 (61-266, 61-266B, 61-266C, 61-266D and 61-266E) under \"Applicability.\" The amendment therefore changes the AD from a prior version by explicitly accepting or referencing additional SB revisions and by delegating mandatory rework details to the requirement document and those listed SBs (see header: \"Amdt 1\" and the \"Applicability\" list)."},"complexity_factors":["Short, high-level AD text that delegates technical detail to external documents (requirement document and listed service bulletins).","Multiple service bulletin revisions listed (61-266 through 61-266E) create versioning complexity for determining exact work required.","No explicit compliance times, procedures or alternative means of compliance within the AD text — those are in external documents.","Regulatory effect is clear but operational implementation depends on locating and interpreting the cited service bulletins and requirement document.","Amendment status (Amdt 1) implies a change from an earlier text, requiring comparison with earlier AD to determine what changed in scope or procedure."],"plain_english_summary":"What this instrument does (mechanically)\n\n- This is an airworthiness directive (AD) that requires a rework of propeller blades on specified Dowty Rotol variable-pitch propellers. (See \"AD/PR/2 Amdt 1\" heading.)\n- The AD makes the rework mandatory by reference to a separate \"requirement document\" and to specific Dowty Rotol service bulletins: SB No. 61-266, 61-266B, 61-266C, 61-266D and 61-266E. (See \"Applicability\" list.)\n- The instruction on how, when and where to carry out the rework is contained in the requirement document and the listed service bulletins; the Compliance line says: \"As detailed in the requirement document.\" (See \"Compliance\".)\n\nWho this affects\n\n- Aircraft owners/operators and maintenance organisations who operate or maintain the affected Dowty Rotol variable‑pitch propellers named in the requirement document and in the listed service bulletins. (See \"Applicability\" list.)\n- The Civil Aviation Safety Authority (CASA) is the issuing regulator; the requirement document and listed service bulletins determine the technical steps and timing. (Document header: Schedule of Airworthiness Directives; Applicability and Compliance lines.)\n\nWhy it matters (stated purpose and operational effect)\n\n- This AD requires a specified technical rework of propeller blades. The text itself does not include a narrative explanation of the underlying safety concern; it sets a regulatory obligation to carry out the rework by following the requirement document and the listed Dowty Rotol service bulletins. (See \"Applicability\" and \"Compliance\".)\n\nOperational consequences, incentives and trade-offs (mechanisms, costs and decision points)\n\n- Who pays and who decides: The owner/operator or the maintenance organisation will need to arrange and pay for the rework. The regulator issues the AD and the requirement document/service bulletins set the mandatory procedures and timing. (See header, \"Applicability\" and \"Compliance\".)\n- Behaviour change required: Affected operators must schedule and perform the rework described in the requirement document/service bulletins instead of continuing current maintenance practices for the blades; operators must follow the technical steps and any compliance dates those documents prescribe. (See \"Compliance\".)\n- Compliance burden and downtime: The concrete burdens are those set out in the external requirement document and service bulletins — typically labour, parts, inspection and aircraft downtime. This AD delegates the specific burden and timing to those documents. (See \"Compliance\" and the list of service bulletins under \"Applicability\".)\n- Implementation discretion and update path: The AD references multiple versions/revisions of the same service bulletin (61-266 through 61-266E). That indicates the regulator accepts compliance via one of several listed revision levels; the exact technical steps and any allowable alternatives depend on the content of those SBs and the requirement document. (See the series of SB numbers under \"Applicability\".)\n\nRisk and substitution effects to note (mechanisms, not judgements)\n\n- Because the AD ties mandatory action to external documents, the actual technical scope, cost and timing depend on those documents; different SB revisions may change what work is required. (See list of SBs.)\n- The AD text itself lacks specific compliance deadlines or cost estimates; this leaves schedule and resource implications to be determined by the requirement document and the relevant service bulletin revision. (See \"Compliance\".)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive format consistent with CASA's long-standing practice of issuing mandatory safety directives referencing manufacturer service bulletins. The amendment (Amdt 1) appears to update the acceptable document versions but does not represent scope creep beyond the original purpose of ensuring propeller airworthiness."},"complexity_factors":["Extremely short document (approximately 200 words)","No defined terms section - relies entirely on external technical references","Simple structure: applicability, document reference, compliance","No conditional logic or nested exceptions","Cross-references are limited to five specific service bulletin numbers","Technical content is delegated to external manufacturer documents (the service bulletins)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It mandates specific maintenance work on **variable pitch propellers** made by **Dowty Rotol**.\n\n**What it does:**\n- Requires owners or operators of affected aircraft to perform \"rework\" (repair or modification) on propeller blades according to specific manufacturer service bulletins.\n- Lists five acceptable versions of the technical document to follow (Service Bulletins 61-266 through 61-266E).\n\n**Who it affects:**\n- Aircraft operators and maintenance organisations using Dowty Rotol variable pitch propellers.\n- The exact aircraft and propeller models affected are detailed in the referenced service bulletins (not reproduced in this document).\n\n**Why it matters:**\n- Airworthiness Directives are **legally binding safety orders**. Non-compliance means the aircraft cannot legally fly.\n- This directive likely addresses a discovered defect or wear pattern in propeller blades that could affect flight safety if left unaddressed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework","history":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework/history","analysis":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework/analysis","conflicts":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework/conflicts","importantCases":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework/important-cases","documents":"/api/acts/ad-pr-2-amdt-1-propeller-blade-rework/documents"}}