{"id":"F2006L00140","name":"AD/EC 135/11 - Emergency Flotation System","slug":"ad-ec-135-11-emergency-flotation-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58023,"registerId":"commonwealth-F2006L00140-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter EC 135 Series Helicopters","sectionType":"division","heading":"Eurocopter EC 135 Series Helicopters","content":"### Eurocopter EC 135 Series Helicopters\n\n| AD/EC 135/11 | Emergency Flotation System | 2/2006 |\n| ------------ | -------------------------- | ------ |\n\n| Applicability: | Model EC 135 helicopters, equipped with removable and/or fixed part of emergency flotation system version I.                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Remove the removable part of emergency flotation system version I, and install removable parts of emergency flotation system version II. Install all components relevant for the emergency flotation system version II. Accomplish the above actions in accordance with Eurocopter Deutschland EC 135 Alert Service Bulletin No. EC135-32A-010 dated 13 September 2004.Note: LBA AD D-2005-414 refers. |\n| Compliance:    | Within 4 weeks after 16 February 2006, unless already accomplished.                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 16 February 2006.                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | It has been determined that the removable part of the ECD emergency flotation system version I no longer meets its requirements because of an increase in admissible maximum take-off weight of the Model EC 135 helicopters.                                                                                                                                                                          |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 December 2005","sortOrder":0},{"sectionNumber":"AD/EC 135/11","sectionType":"part","heading":"AD/EC 135/11","content":"## AD/EC 135/11","sortOrder":1},{"sectionNumber":"Emergency Flotation System","sectionType":"part","heading":"Emergency Flotation System","content":"## Emergency Flotation System","sortOrder":2},{"sectionNumber":"2/2006","sectionType":"part","heading":"2/2006","content":"## 2/2006","sortOrder":3}],"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains limited to EC135 helicopters equipped with EFS version I. The instrument requires replacing the removable flotation component with version II parts and installing all components relevant to version II within the specified four‑week period; it does not broaden applicability to other models or systems beyond what the AD describes (Applicability/Requirement/Compliance)."},"complexity_factors":["Narrow applicability: only Model EC135 helicopters fitted with removable and/or fixed EFS version I are affected (Applicability).","Single, discrete technical action: remove removable part of EFS version I and install removable parts and all relevant components of version II (Requirement).","Prescriptive compliance method: work must follow Eurocopter EC135 Alert Service Bulletin No. EC135-32A-010 dated 13 Sep 2004 (Requirement).","Short compliance window: mandatory completion within four weeks after 16 February 2006 (Compliance) increases scheduling and logistics pressure on operators.","Upfront cost and operational disruption: operators bear retrofit costs and must allocate maintenance time and parts, creating potential short-term availability impacts (Compliance/Requirement).","Regulatory linkage: AD references a related LBA AD (D-2005-414), indicating coordination with another authority (Requirement/Background).","Limited regulatory discretion: the AD prescribes specific technical steps and a deadline, leaving little room for alternative compliance without regulator approval (Requirement/Compliance)."],"plain_english_summary":"Directs operators of Eurocopter EC135 helicopters fitted with emergency flotation system (EFS) version I to remove the removable flotation component and install version II components, following Eurocopter's EC135 Alert Service Bulletin. The work must be done within four weeks of 16 February 2006. Operators pay for and schedule the retrofit to meet the regulator's deadline; the change is intended to ensure the flotation system meets requirements after an increase in maximum take‑off weight."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific technical defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating flotation system upgrades."},"complexity_factors":["Very short document (under 300 words)","Single, unambiguous requirement with clear action steps","Only 1 defined term implicitly referenced (the Service Bulletin)","No nested exceptions or conditional logic — straightforward applicability test (model EC 135 + version I flotation system)","Single compliance deadline with one simple exception clause ('unless already accomplished')","No cross-references to other legislation beyond a note about a German aviation authority document (LBA AD D-2005-414)"],"plain_english_summary":"This AD requires owners/operators of Eurocopter EC135 helicopters fitted with the original \"version I\" emergency flotation system to remove it and install the updated \"version II\" system and associated components per Eurocopter Service Bulletin EC135-32A-010. It targets any EC135 with version I equipment because the helicopter’s increased maximum take-off weight now exceeds version I’s flotation capability, creating ditching safety risks. Compliance was required within 4 weeks of 16 February 2006."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ec-135-11-emergency-flotation-system","history":"/api/acts/ad-ec-135-11-emergency-flotation-system/history","analysis":"/api/acts/ad-ec-135-11-emergency-flotation-system/analysis","conflicts":"/api/acts/ad-ec-135-11-emergency-flotation-system/conflicts","importantCases":"/api/acts/ad-ec-135-11-emergency-flotation-system/important-cases","documents":"/api/acts/ad-ec-135-11-emergency-flotation-system/documents"}}