{"id":"F2010L03113","name":"AD/JBK 117/35 - Locked Cyclic Stick","slug":"ad-jbk-117-35-locked-cyclic-stick","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":85253,"registerId":"commonwealth-F2010L03113-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 117/35 | Locked Cyclic Stick | 24/2010 |\n| ------------- | ------------------- | ------- |\n\n| Applicability: | Kawasaki BK117, BK117A-3, BK117A-4, BK117B-1, BK117-B-2 and BK117C-1.                                                                                                      |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Japan Civil Aviation Bureau (JCAB) Airworthiness Directive (AD) No. TCD-7479-2009.                                                               |\n| Compliance:    | Within three months of the effective date of this Airworthiness Directive.                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 9 December 2010.                                                                                                         |\n| Background:    | JCAB has issued this directive to prevent any further occurrences of inadvertent take-off with a locked cyclic stick, which may lead to loss of control of the helicopter. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n23 November 2010","sortOrder":0},{"sectionNumber":"AD/JBK 117/35","sectionType":"part","heading":"AD/JBK 117/35","content":"## AD/JBK 117/35","sortOrder":1},{"sectionNumber":"Locked Cyclic Stick","sectionType":"part","heading":"Locked Cyclic Stick","content":"## Locked Cyclic Stick","sortOrder":2},{"sectionNumber":"24/2010","sectionType":"part","heading":"24/2010","content":"## 24/2010","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical/safety issue (locked cyclic stick) for a defined aircraft series. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — uses common aviation terminology only","Single operative requirement: 'Action in accordance with JCAB AD No. TCD-7479-2009'","No conditional logic, exceptions, or nested provisions","Cross-reference to external document (JCAB AD) but does not reproduce its contents","Simple compliance deadline structure (fixed date + 3-month window)"],"plain_english_summary":"This AD mandates owners/operators of specified Kawasaki BK117 models to comply with Japan’s JCAB Airworthiness Directive TCD-7479-2009 to prevent accidental takeoff with the cyclic stick locked. It affects Kawasaki BK117, BK117A-3/A-4, BK117B-1/B-2, and BK117C-1 helicopters. This is safety-critical—an unlocked cyclic on takeoff risks loss of control—and legally binding; compliance was required within three months of 9 December 2010."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument's scope, applicability, and stated objective are consistent within the document: it applies to named BK117 variants and requires compliance with the JCAB AD to prevent locked cyclic stick take-offs. The AD defers technical specifics to the JCAB directive but does not indicate any expansion or narrowing beyond the stated applicability."},"complexity_factors":["Narrow applicability to specific Kawasaki BK117 variants reduces regulatory breadth but concentrates impact on a defined operator subset (Applicability).","The AD delegates technical content to an external JCAB Airworthiness Directive (cross-reference required), so compliance requires obtaining and following a separate foreign document (Requirement).","Short compliance window (three months) creates scheduling and logistical pressure for operators to inspect/repair affected helicopters (Compliance).","The instrument contains no step-by-step technical instructions itself; implementation detail and technical discretion rest with the JCAB AD and the operator/maintenance provider (Requirement).","Enforcement and administrative effect are managed by CASA via its delegate, implying standard aviation enforcement pathways rather than novel administrative mechanisms (signature/delegate)."],"plain_english_summary":"This Airworthiness Directive requires operators of listed Kawasaki BK117 variants to perform the corrective actions set out in Japan Civil Aviation Bureau AD No. TCD‑7479‑2009; compliance is required within three months and the directive became effective 9 December 2010 (Applicability, Requirement, Compliance). The stated purpose is to prevent inadvertent take-off with a locked cyclic stick that could cause loss of control; operators pay for inspections/repairs, CASA (via its delegate) enforces compliance, and affected operators must change maintenance or pre‑flight procedures (Background, Requirement)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-35-locked-cyclic-stick","history":"/api/acts/ad-jbk-117-35-locked-cyclic-stick/history","analysis":"/api/acts/ad-jbk-117-35-locked-cyclic-stick/analysis","conflicts":"/api/acts/ad-jbk-117-35-locked-cyclic-stick/conflicts","importantCases":"/api/acts/ad-jbk-117-35-locked-cyclic-stick/important-cases","documents":"/api/acts/ad-jbk-117-35-locked-cyclic-stick/documents"}}