{"id":"F2006B04177","name":"AD/BEECH 76/2 - Cowl Flap Hinge Assemblies","slug":"ad-beech-76-2-cowl-flap-hinge-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43930,"registerId":"commonwealth-F2006B04177-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 76/2 - Cowl Flap Hinge Assemblies","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)  Beechcraft 76 (Duchess) Series Aeroplanes\n\n \n\nAD/BEECH 76/2 Cowl Flap Hinge Assemblies 6/79\n\nApplicability: All model 76 with S/Nos. ME-1 to ME-6 and ME-8 to ME-79. Requirement: Action in accordance with Beechcraft SI No. 1044.\n\nCompliance: Unless already accomplished, within 100 hours’ time in service after 30 June 1979. Background:              The existing aluminium hinge is subject to cracking and failure in service.\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":1506},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope targeting a specific defective part on specific aircraft models. There is no evidence of expansion beyond the original safety intent to address cracking aluminium hinges."},"complexity_factors":["Single, unambiguous maintenance requirement with no exceptions or sub-clauses","Narrow applicability limited to specific aircraft serial number ranges","No defined terms, interpretation provisions, or cross-references to other legislation","Simple, absolute compliance deadline (100 hours after fixed date)"],"plain_english_summary":"This Airworthiness Directive (AD) mandates urgent safety maintenance on specific Beechcraft 76 Duchess aeroplanes to prevent mechanical failure.\n\n**What it requires:**\nOwners and operators must inspect and repair or replace the **cowl flap hinge assemblies** (the metal parts that allow engine cooling flaps to move) according to the manufacturer's **Service Instruction No. 1044**.\n\n**Who must comply:**\nOnly applies to Model 76 aircraft with serial numbers ME-1 through ME-6 and ME-8 through ME-79.\n\n**When:**\nThe work had to be completed within **100 hours of flight time** after 30 June 1979, unless already done.\n\n**Why it matters:**\nThe original aluminium hinges were cracking and failing during normal use. If a hinge fails in flight, it could cause the cowl flap (which controls engine cooling) to detach or malfunction, potentially leading to engine damage or loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies","history":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies/history","analysis":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies/analysis","conflicts":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies/conflicts","importantCases":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies/important-cases","documents":"/api/acts/ad-beech-76-2-cowl-flap-hinge-assemblies/documents"}}