{"id":"F2006B09056","name":"AD/DHC-2/8 - Beaver Wing - Prevention of Flutter - Inspection","slug":"ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52787,"registerId":"commonwealth-F2006B09056-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-2/8 - Beaver Wing - Prevention of Flutter - Inspection","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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  DHC-2 (Beaver) Series Aeroplanes\n\n \n\nAD/DHC-2/8 Beaver Wing - Prevention of Flutter - Inspection 4/63\n\nApplicability: All models.\n\n \n\nDocument: Hawker De Havilland Australia. TNS DHC-2 Aust. No. 1. 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\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. Airworthiness Directives are inherently narrow in scope — they address specific technical safety issues for specific aircraft types. There is no indication this AD has expanded beyond its original purpose of preventing wing flutter in Beaver aircraft."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies entirely on external technical reference","Single, straightforward applicability clause ('All models')","No conditional logic, exceptions, or nested provisions","Simple cross-reference to one external technical document (Hawker De Havilland Australia TNS DHC-2 Aust. No. 1)","No legislative amendments, transitional provisions, or interpretive rules"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific type of aircraft.\n\n**What it does:**\n- Requires owners and operators of **de Havilland Canada DHC-2 \"Beaver\" aircraft** to inspect the wings to prevent a dangerous vibration problem called **\"flutter\"** (a rapid, uncontrolled shaking that can destroy an aircraft in flight).\n- The directive references a technical document from Hawker De Havilland Australia (TNS DHC-2 Aust. No. 1) that contains the specific inspection requirements.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains **any model of DHC-2 Beaver aircraft** registered in Australia.\n\n**Why it matters:**\n- Flutter is a serious aerodynamic instability that can lead to catastrophic structural failure. This AD ensures that potential wing defects that could trigger flutter are identified and fixed before they cause accidents.\n- Compliance is **mandatory** — you cannot legally fly the aircraft until the inspection is completed as specified in the referenced document."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD as presented does not indicate any change of scope from a prior instrument. It states applicability as \"All models\" and delegates compliance details to the referenced Hawker De Havilland document. The text contains no amendment language or comparative reference implying a change in scope."},"complexity_factors":["Brevity of the AD text: the directive states purpose and applicability but omits procedural details.","Reliance on an external requirement document (Hawker De Havilland TNS DHC-2 Aust. No. 1) for compliance specifics.","Broad applicability clause (\"All models\") increases the potential variation of applicable configurations and fleet conditions.","Absence of in-text inspection intervals, methods, corrective actions, or deadlines increases implementation uncertainty.","Regulatory placement within Part 39 creates formal mandatory effect, but the AD defers technical content to the manufacturer document, concentrating technical authority outside the AD text."],"plain_english_summary":"This AD mandates inspections to prevent wing flutter on all DHC‑2 (Beaver) aircraft, directing compliance to the Hawker De Havilland requirement document \"TNS DHC‑2 Aust. No. 1.\" It is issued by the Civil Aviation Safety Authority under Part 39.\n\nIt matters because the AD creates a mandatory safety obligation for owners/operators but does not include inspection methods, intervals, or costs within the text—those specifics must be obtained from the referenced document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection","history":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection/history","analysis":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection/analysis","conflicts":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection/conflicts","importantCases":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection/important-cases","documents":"/api/acts/ad-dhc-2-8-beaver-wing-prevention-of-flutter-inspection/documents"}}