{"id":"F2006B04709","name":"AD/BELL 47/87 Amdt 1 - Stabiliser Bar Damper Frame Clamp","slug":"ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44473,"registerId":"commonwealth-F2006B04709-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 47/87 Amdt 1 - Stabiliser Bar Damper Frame Clamp","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 47 (All Variants) Series Helicopters\n\n \n\nAD/BELL 47/87\n\nAmdt 1\n\n\nStabiliser Bar Damper Frame Clamp 10/86\n\n \n\nApplicability: All models fitted with stabiliser bar damper frame clamp P/N 47-140-134-001, or 47- 140-134-1001.\n\n \n\nDocument: Bell ASB 47-81-7. Kawasaki-Bell S.B. KSB-Bell 354. Compliance:  Within 25 hours time in service after 30 September 1981.\n\nBackground: The manufacturer advises of eight known cases of failure of a stabiliser bar damper frame clamp. This Directive has been amended to include Kawasaki-Bell Helicopters.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1821},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"Amended to expand applicability from Bell Helicopter Textron models to also include Kawasaki-Bell helicopters (as indicated in the Background section)."},"complexity_factors":["Extremely short document (under 150 words)","Single, clear compliance action with unambiguous deadline","Applicability limited to two specific part numbers only","No exceptions, nested conditions, or cross-references to other legislative provisions"],"plain_english_summary":"**What this does:** This Airworthiness Directive (a mandatory safety order) requires owners and operators of Bell 47 helicopters to inspect or replace a faulty metal bracket called the **stabiliser bar damper frame clamp**.\n\n**Who it affects:** Anyone operating Bell 47 helicopters fitted with specific part numbers **47-140-134-001** or **47-140-134-1001**. This now includes both Bell Helicopter Textron models and Kawasaki-Bell variants.\n\n**What you must do:** Check or replace the clamp within **25 hours of flight time** after 30 September 1981.\n\n**Why it matters:** The manufacturer reported eight known failures of this clamp. If the clamp breaks, it can compromise the rotor stabilisation system, potentially leading to loss of flight control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp","history":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp/history","analysis":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp/analysis","conflicts":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp/conflicts","importantCases":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp/important-cases","documents":"/api/acts/ad-bell-47-87-amdt-1-stabiliser-bar-damper-frame-clamp/documents"}}