{"id":"F2006B10641","name":"AD/HU 269/82 Amdt 1 - Main Rotor Blade Elastometric Dampers","slug":"ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116546,"registerId":"commonwealth-F2006B10641-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/82 Amdt 1 - Main Rotor Blade Elastometric Dampers","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)  Schweizer (Hughes) 269 Series Helicopters\n\n \n\nAD/HU 269/82\n\nAmdt 1\n\n\nMain Rotor Blade Elastometric Dampers 8/87\n\n \n\nApplicability: All 269 Series Helicopters fitted with P/No. 269A1290-1 elastomeric dampers. Requirement:               Action in accordance with Schweizer S.I.N. No. N-201-1.\n\nCompliance: Part I of Requirement Document:\n\n \n\nwithin 300 hours time in service after 31 December 1986.\n\n \n\nPart II of Requirement Document:\n\n \n\nany time adjustment of the elastomeric damper is carried out.\n\n \n\nBackground:  Moisture and contaminants have seeped into some elastomeric damper assemblies, causing bun separation and corrosion. This Directive has been amended to include the latest Requirement Document which has been amended to change the type of sealant.\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 \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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment updates the Requirement Document to change the type of sealant used (Background) but does not expand or narrow the population of affected aircraft (Applicability) or alter the compliance triggers (Compliance). The directive’s technical specification was revised, not its applicability."},"complexity_factors":["Cross-reference to an external Requirement Document (Schweizer S.I.N. No. N-201-1) means the directive’s full technical steps are not contained in the AD itself, increasing implementation reliance on another document (Requirement).","Dual compliance triggers: a time-based deadline (within 300 hours after 31 Dec 1986) and an event-based trigger (any time a damper is adjusted) create separate scheduling and record‑keeping obligations (Compliance).","Amendment changes the type of sealant in the Requirement Document, which may require different parts, materials or techniques from earlier versions (Background).","Narrow applicability (only 269 Series with P/No. 269A1290-1) demands precise parts/airframe identification by operators and maintainers (Applicability).","The AD does not list detailed remedial steps in full; interpretation and execution depend on the referenced S.I.N., creating potential for maintenance judgment and administrative coordination (Requirement; Compliance)."],"plain_english_summary":"Owners/operators of Schweizer (Hughes) 269 helicopters fitted with P/No. 269A1290-1 elastomeric dampers must carry out the actions specified in Schweizer Service Information Notice N‑201‑1 to address moisture/contaminant ingress that has caused damper separation and corrosion (Applicability; Requirement; Background). Part I work is required within 300 hours time in service after 31 December 1986; Part II work is required whenever an elastomeric damper is adjusted (Compliance). Costs and work responsibility fall to the aircraft owner/operator."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose — addressing elastomeric damper moisture ingress in Schweizer 269 helicopters. The amendment simply updates the technical specification (sealant type) without expanding applicability, adding new aircraft types, or broadening regulatory reach."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (P/No. 269A1290-1)","Simple two-part compliance structure with clear deadlines","No cross-references to other legislation beyond parenthetical mention of Civil Aviation Regulations 1998, Part 39","Single amendment purpose (updating sealant specification)","Background explanation provided in plain language"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it as a \"recall notice\" for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of **Schweizer (Hughes) 269 Series helicopters** to inspect and fix a specific problem with their **main rotor blade elastomeric dampers** (rubber-like shock absorbers that reduce vibration in the rotor system).\n\n**The problem:** Moisture and dirt have been getting into the damper assemblies, causing the rubber components to separate (\"bun separation\") and metal parts to corrode. This could lead to rotor system failure.\n\n**Who must act:** Anyone operating a 269 Series helicopter fitted with part number **269A1290-1** elastomeric dampers.\n\n**What they must do:**\n- **Part I:** Complete initial inspections and fixes within **300 flight hours** after 31 December 1986\n- **Part II:** Follow specific procedures whenever these dampers are adjusted\n\n**Why it matters:** This amendment updates the required sealant type to better keep moisture out. Non-compliance means the helicopter cannot legally fly — it's a safety-critical fix preventing potential catastrophic rotor failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers","history":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers/history","analysis":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers/analysis","conflicts":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers/conflicts","importantCases":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers/important-cases","documents":"/api/acts/ad-hu-269-82-amdt-1-main-rotor-blade-elastometric-dampers/documents"}}