{"id":"F2009L03834","name":"AD/JBK 117/34 - Rescue Hoist Assembly","slug":"ad-jbk-117-34-rescue-hoist-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81071,"registerId":"commonwealth-F2009L03834-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Kawasaki BK 117 Series Helicopters","sectionType":"division","heading":"Kawasaki BK 117 Series Helicopters","content":"### Kawasaki BK 117 Series Helicopters\n\n| AD/JBK 117/34 | Rescue Hoist Assembly | 12/2009 |\n| ------------- | --------------------- | ------- |\n\n| Applicability: | Model BK117C-2 helicopters equipped with a rescue hoist assembly part number 44301-10-4 or 44301-10-7 with serial numbers 00002 through 00285.              |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of JCAB AD TCD-7532-2009.                                                                                        |\n| Compliance:    | As specified in the Requirement document.                                                                                                                   |\n|                | This Airworthiness Directive becomes effective on 19 November 2009.                                                                                         |\n| Background:    | The JCAB requires certain actions to prevent improper level winding of the cable, caused by damage of the Level Wind Screw due to non-conforming machining. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 September 2009","sortOrder":0},{"sectionNumber":"AD/JBK 117/34","sectionType":"part","heading":"AD/JBK 117/34","content":"## AD/JBK 117/34","sortOrder":1},{"sectionNumber":"Rescue Hoist Assembly","sectionType":"part","heading":"Rescue Hoist Assembly","content":"## Rescue Hoist Assembly","sortOrder":2},{"sectionNumber":"12/2009","sectionType":"part","heading":"12/2009","content":"## 12/2009","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change of scope is apparent from the text supplied. The AD explicitly targets rescue hoist assemblies with specified part and serial numbers on BK117C-2 helicopters and mandates actions in the cited JCAB AD to prevent improper cable winding (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability limited to specific helicopter model and hoist P/Ns and S/N range (Applicability)","Direct cross-reference to an external mandatory document (JCAB AD TCD-7532-2009) rather than reproducing remedial steps (Requirement)","Technical specificity tied to a particular component failure mode (Level Wind Screw non-conforming machining) that requires specialised inspection/repair (Background)","Mandatory compliance with an effective date creates scheduling and operational-planning burdens (Compliance; Effective date)","Enforcement and administrative direction issued by CASA delegate, leaving little operator discretion (Delegate signature; Requirement)"],"plain_english_summary":"This Airworthiness Directive requires operators of Kawasaki BK117C-2 helicopters fitted with rescue hoist assemblies P/N 44301-10-4 or 44301-10-7 (S/N 00002–00285) to carry out the inspections, repairs or modifications specified in JCAB AD TCD-7532-2009 to prevent improper cable level‑winding caused by damaged Level Wind Screws (Applicability; Requirement; Background). Operators must comply by the effective date (19 November 2009); CASA issued the AD through its delegate and enforces compliance, which creates inspection, parts and downtime costs for affected operators (Compliance; Effective date; Delegate)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific manufacturing defect in a specific helicopter component. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 2 specific part numbers and 1 serial number range to identify affected aircraft","Single requirement: comply with an external document (JCAB AD TCD-7532-2009)","No defined terms section","No conditional logic or nested exceptions","No cross-references to other Australian legislation","Straightforward applicability test: model + part number + serial number range"],"plain_english_summary":"This AD mandates that operators of Kawasaki BK117C-2 helicopters fitted with specific rescue hoists (P/N 44301-10-4 or 44301-10-7, S/N 00002–00285) comply with JCAB AD TCD-7532-2009 maintenance instructions. It addresses incorrectly machined level wind screws that can cause the hoist cable to spool unevenly, risking cable damage or hoist failure during rescues — a critical safety hazard for life-saving operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly","history":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly/history","analysis":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly/analysis","conflicts":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly/conflicts","importantCases":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly/important-cases","documents":"/api/acts/ad-jbk-117-34-rescue-hoist-assembly/documents"}}