{"id":"F2006B04580","name":"AD/BELL 212/48 - Tension Torsion Straps Retention Pins","slug":"ad-bell-212-48-tension-torsion-straps-retention-pins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114312,"registerId":"commonwealth-F2006B04580-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 212/48 - Tension Torsion Straps Retention Pins","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 212/48 Tension Torsion Straps Retention Pins 12/91\n\nTX\n\n \n\nApplicability:   All model 212 helicopters.\n\n \n\nRequirement:  Action in accordance with Bell Alert Service Bulletin No 212-91-68. Compliance:   Prior to further flight after 17 October 1991.\n\nBackground:  The manufacturer has become aware that bogus torsion strap retention pins P/N 204- 012-104-005 may have been purchased and installed in the main rotor hub assembly. The replacement pins have a significant reduction in material strength and could fail prematurely.\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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1332},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope, targeting only the specific safety defect involving counterfeit retention pins in Bell 212 helicopter rotor assemblies."},"complexity_factors":["Single unambiguous safety mandate with no exceptions or conditional provisions","External reference to manufacturer service bulletin without complex incorporation by reference","Clear applicability (all model 212 helicopters) and absolute compliance deadline","No definitions, interpretation clauses, or nested legal provisions"],"plain_english_summary":"**What this does:** This safety directive requires immediate replacement of counterfeit (fake) retention pins in the main rotor hub of Bell 212 helicopters. These pins hold critical tension-torsion straps (components that help manage stress on the rotor blades) in place.\n\n**Who it affects:** All owners and operators of Bell 212 model helicopters.\n\n**What you must do:** Follow the instructions in Bell Alert Service Bulletin No 212-91-68. This must be completed before the next flight after 17 October 1991.\n\n**Why it matters:** Fake parts bearing part number 204-012-104-005 have entered the supply chain. While they look genuine, they are made from significantly weaker materials and could snap unexpectedly. If these pins fail in flight, the main rotor could detach, causing catastrophic loss of the aircraft and crew."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins","history":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins/history","analysis":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins/analysis","conflicts":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins/conflicts","importantCases":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins/important-cases","documents":"/api/acts/ad-bell-212-48-tension-torsion-straps-retention-pins/documents"}}