{"id":"F2006B10870","name":"AD/JBK 117/22 - Airwork Hoist Modification","slug":"ad-jbk-117-22-airwork-hoist-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56373,"registerId":"commonwealth-F2006B10870-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor 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 CASR 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 aircraft or 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![](image.001.png)  \n\nKawasaki BK 117 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/JBK 117/22 Airwork Hoist Modification","sectionType":"part","heading":"AD/JBK 117/22 Airwork Hoist Modification 11/2004","content":"# AD/JBK 117/22 Airwork Hoist Modification 11/2004\n\nTX\n\nApplicability: BK-117 helicopters with fitted with Airwork (NZ) Ltd hoist modification ARD/721, ARD/741, ARD/752, ARD/977, ARD/999.STC or STC.AW.0003.\n\nRequirement: 1. Inspect the CABLE CUT switch guard in accordance with Airwork (NZ) Ltd Service Bulletin (SB) SB.AW.0001 Issue 1 dated 19 August 2004 to determine the part number (P/N) of the switch guard.\n\n    2. If, as a result of the Requirement 1 inspection, the P/N of the switch guard is not MS25224-1, \\-2 or \\-3, replace the switch guard in accordance with SB.AW.0001 Issue 1.\n\n    3. Replace the two position switch with a momentary action switch P/N MS24523- 26 or MS24524-26, as applicable, and if not already installed, fit switch guard P/N MS25224-3 in accordance with SB.AW.0001 Issue 1.\n\nNote 1: Only switch guard P/N MS25224-3 is acceptable with the new momentary contact switch (P/N MS25224-1, \\-2 or \\-3 are acceptable prior to replacement of the switch).\n\nNote 2: CAA(NZ) AD DCA/BK117/14 refers.\n\nCompliance: For Requirement 1 \\- Before the next hoist operation after the effective date of this Directive.\n\nFor Requirement 2 \\- Before further operation of the hoist after the Requirement 1 inspection.\n\nFor Requirement 3 \\- Within 100 hours time in service after the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 1 September 2004.","sortOrder":1}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific unsafe condition in a specific aircraft modification. The scope remains precisely limited to the identified safety issue with the CABLE CUT switch on Airwork hoist modifications for BK-117 helicopters. There is no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, clearly defined applicability (specific helicopter model with specific hoist modification)","Only 3 sequential requirements with straightforward conditional logic (if-then)","2 brief notes clarifying part number compatibility","Simple compliance timeline with 3 distinct deadlines tied to operational milestones","No defined terms section, no cross-references to other legislation beyond a single reference to a New Zealand aviation directive","Total length is approximately 250 words"],"plain_english_summary":"This safety order applies to Kawasaki BK‑117 helicopters fitted with specified Airwork (NZ) hoist mods. CASA requires inspection of the CABLE CUT switch guard, replacement of non‑approved guards with MS25224‑1/‑2/‑3 as needed, and installation of a momentary‑action CABLE CUT switch paired with MS25224‑3 to reduce accidental or latent activation. It affects owners, operators and maintenance engineers; inspections before the next hoist use, guard replacement before further hoist use, and switch upgrade within 100 flight hours. Effective 1 September 2004."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is confined to BK‑117 helicopters fitted with the listed Airwork (NZ) hoist STCs and directs specific inspection and part replacements; the AD does not broaden applicability beyond those modifications or add other systems."},"complexity_factors":["Specific applicability limited to BK‑117 helicopters fitted with particular Airwork (NZ) hoist STCs (ARD/721, ARD/741, ARD/752, ARD/977, ARD/999.STC or STC.AW.0003) — narrows affected fleet but requires accurate configuration checks.","Multiple, staged actions: inspection (Requirement 1), conditional immediate replacement before further hoist use (Requirement 2), and a mandatory parts replacement within 100 hours (Requirement 3).","Parts and part‑number rules: acceptance of certain P/Ns before or after replacement (MS25224‑1/‑2/‑3; only MS25224‑3 acceptable with new momentary switch; replacement switch P/N MS24523‑26 or MS24524‑26) increases logistics complexity.","Dependency on Airwork (NZ) Ltd Service Bulletin SB.AW.0001 Issue 1 for procedural details — operators must obtain and follow the SB.","Cross‑reference to CAA(NZ) AD DCA/BK117/14 creates multilaterally referenced compliance obligations.","Compliance timing differences (immediate before next hoist operation vs within 100 hours) impose scheduling and operational constraints on operators.","Enforcement under CASR subreg 39.1(1) means the regulator can require the corrective action; liability for parts/labour rests with operators/owners."],"plain_english_summary":"This AD requires operators of Kawasaki BK‑117 helicopters fitted with Airwork (NZ) hoist STCs to inspect the CABLE CUT switch guard, replace any non‑conforming guards, and replace a two‑position switch with a specified momentary‑action switch and guard. The AD is issued to correct an unsafe condition; operators (owners) must perform the work at the stated times (before next hoist use, before further hoist operation after inspection, and within 100 hours) and will bear parts and labour costs, with CASA enforcing compliance under CASR subreg 39.1(1)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-22-airwork-hoist-modification","history":"/api/acts/ad-jbk-117-22-airwork-hoist-modification/history","analysis":"/api/acts/ad-jbk-117-22-airwork-hoist-modification/analysis","conflicts":"/api/acts/ad-jbk-117-22-airwork-hoist-modification/conflicts","importantCases":"/api/acts/ad-jbk-117-22-airwork-hoist-modification/important-cases","documents":"/api/acts/ad-jbk-117-22-airwork-hoist-modification/documents"}}