{"id":"F2006B10865","name":"AD/JBK 117/16 - Transmission and Engine Cowling Hook System","slug":"ad-jbk-117-16-transmission-and-engine-cowling-hook-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56362,"registerId":"commonwealth-F2006B10865-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JBK 117/16 - Transmission and Engine Cowling Hook System","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)  \n![](image.002.png)  Kawasaki BK 117 Series Helicopters\n\n \n\n# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. 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 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 \n\n# AD/JBK 117/16 Transmission and Engine Cowling Hook System\n\n\n2/2000\n\n \n\nApplicability: Model BK 117 Series, serial numbers 1001 through 1123, except 1007, 1085, and\n\n1107.\n\n \n\nRequirement: Action in accordance with Kawasaki Service Bulletin KSB-117-154, dated 25 November 1999.\n\n \n\nNote: JCAB AD TCD-5190-99 refers.\n\n \n\nCompliance: Before 30 December 2000, unless already accomplished.\n\n \n\nThis Airworthiness Directive becomes effective on 23 March 2000.\n\n \n\nBackground: The JCAB requires the installation of a hook system to the doors of the transmission and engine cowlings to prevent the doors from opening fully during flight; in the event of the door fasteners not being correctly latched during pre-flight check.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\n\n \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 13 January 2000\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![](image.002.png)  \n\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 27 January 2000.\n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in a specific aircraft type. The scope remains tightly focused on the original safety issue (cowling door security) and has not expanded beyond this technical fix."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined elements: applicability (specific serial numbers), requirement (single service bulletin reference), and compliance deadline","No nested conditional logic or cross-references to other legislation beyond a single note referencing a Japanese authority document","Single straightforward requirement with clear exclusion list (3 serial numbers exempted)","No interpretation section, no defined terms, no penalty provisions"],"plain_english_summary":"This Airworthiness Directive requires owners/operators and maintenance organisations of specified Kawasaki BK 117 helicopters to install a hook system on transmission and engine cowling doors to prevent them swinging fully open in flight if fasteners aren’t secured. Issued in response to a JCAB safety finding, it mandates compliance with Kawasaki Service Bulletin KSB‑117‑154. Effective 23 March 2000; work due by 30 December 2000."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive implements the installation required by the referenced JCAB AD and Kawasaki service bulletin for the specified serial-numbered BK117s. It does not expand applicability beyond those helicopters nor add obligations beyond following the service bulletin and meeting the stated compliance date."},"complexity_factors":["Narrow applicability defined by specific serial numbers (Applicability).","Single mandated action but dependency on an external document: Kawasaki Service Bulletin KSB‑117‑154 (Requirement).","Fixed compliance deadline creates scheduling and logistics pressure for operators (Compliance: before 30 December 2000).","Financial and operational burden falls on aircraft owners/operators (implicit in Requirement and Compliance).","Enforcement and legal effect flow from the CASA delegate's issuance (preface and signature).","Reference to a foreign authority (JCAB AD TCD‑5190‑99) ties action to another regulator's finding (Note).","No alternative compliance paths or exemption procedures are specified in the text (absence of discretionary provisions)."],"plain_english_summary":"Requires installation of a hook system on the transmission and engine cowling doors of Kawasaki BK117 helicopters (serials 1001–1123, except 1007, 1085, 1107) by following Kawasaki Service Bulletin KSB‑117‑154 to prevent doors from opening fully in flight if fasteners are not correctly latched. Operators/owners must pay for and arrange the retrofit and comply by 30 December 2000; the Civil Aviation Safety Authority delegate enforces the directive. The AD reflects a referenced JCAB requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system","history":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system/history","analysis":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system/analysis","conflicts":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system/conflicts","importantCases":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system/important-cases","documents":"/api/acts/ad-jbk-117-16-transmission-and-engine-cowling-hook-system/documents"}}