{"id":"F2006B04582","name":"AD/BELL 212/50 - Swashplate Support","slug":"ad-bell-212-50-swashplate-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114316,"registerId":"commonwealth-F2006B04582-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 212/50 - Swashplate Support","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)  Bell Helicopter Textron 212 Series Helicopters\n\n \n\nAD/BELL 212/50 Swashplate Support  7/92 DM\n\nApplicability: All model 212 helicopters fitted with swashplate support P/N 204-011-404-125. Requirement:               Action in accordance with Bell Alert Service Bulletin 212-91-72.\n\nNote: FAA AD 92-07-08 amdt 39-8204 refers.\n\n \n\nCompliance: Within 25 hours time in service after 30 April 1992.\n\n \n\nBackground: Approximately 156 swashplate support assemblies, P/N 204-011-404-125, were incorrectly machined by a vendor with oversize holes in the two outboard lugs. The vendor attempted to repair the mistake by using oversize bushings in the hole. Bell has rejected the repair scheme and declared the supports unfit for use.\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies only to Model 212 helicopters fitted with the specified swashplate support P/N and mandates actions in a single service bulletin (Applicability; Requirement). The text does not expand or narrow the population beyond that part number, and the compliance deadline and rationale are confined to the identified machining/repair defect (Compliance; Background)."},"complexity_factors":["Single, clearly identified affected part number (Applicability)","Single prescribed action: follow Bell Alert Service Bulletin 212-91-72 (Requirement)","Short, specific compliance window: 25 hours time in service after 30 April 1992 (Compliance)","Root cause and rejected repair explained by vendor error and Bell rejection (Background)","External reference to FAA AD noted (Note), requiring coordination with external guidance","Compliance cost concentrated on operators who must perform and pay for corrective work"],"plain_english_summary":"This directive requires all Bell 212 helicopters fitted with swashplate support P/N 204-011-404-125 to carry out the corrective actions set out in Bell Alert Service Bulletin 212-91-72 within 25 hours time in service after 30 April 1992 (Applicability; Requirement; Compliance). It responds to about 156 supports that were machined with oversize lug holes and repaired with oversize bushings which Bell has declared unfit; operators must arrange and pay the corrective work enforced by the Civil Aviation Safety Authority (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific manufacturing defect in a specific aircraft part. It has not expanded beyond its original purpose of grounding/repairing defective swashplate supports."},"complexity_factors":["Very short document (under 200 words)","Only 1 defined term (P/N = part number, implicitly understood)","Single, unambiguous applicability criterion","No cross-references to other legislation or regulations beyond a single FAA AD reference for information","Clear, single-step compliance requirement","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- Orders owners and operators of certain Bell 212 helicopters to inspect or replace a specific part called a \"swashplate support\" (a component that helps control the helicopter's rotor blades).\n- The affected part has part number **204-011-404-125**.\n\n**Why it matters:**\n- About 156 of these parts were manufactured incorrectly — they had holes that were too big. A supplier tried to fix this by putting oversized bushings (sleeves) in the holes, but the helicopter manufacturer (Bell) rejected this repair as unsafe.\n- If these faulty parts aren't replaced, they could fail in flight, potentially causing loss of control of the helicopter.\n\n**Who must act:**\n- Anyone operating a Bell 212 helicopter with the affected swashplate support part.\n\n**What they must do:**\n- Follow the instructions in **Bell Alert Service Bulletin 212-91-72** (a technical notice from the manufacturer).\n- Complete the work **within 25 flight hours after 30 April 1992**.\n\n**Key point:** This is a time-critical safety mandate. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-50-swashplate-support","history":"/api/acts/ad-bell-212-50-swashplate-support/history","analysis":"/api/acts/ad-bell-212-50-swashplate-support/analysis","conflicts":"/api/acts/ad-bell-212-50-swashplate-support/conflicts","importantCases":"/api/acts/ad-bell-212-50-swashplate-support/important-cases","documents":"/api/acts/ad-bell-212-50-swashplate-support/documents"}}