{"id":"F2006B04070","name":"AD/BEECH 56/8 - Engine Mount Bolt Nuts","slug":"ad-beech-56-8-engine-mount-bolt-nuts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43721,"registerId":"commonwealth-F2006B04070-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 56/8 - Engine Mount Bolt Nuts","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 56TC (Turbo Baron) Series Aeroplanes\n\n \n\nAD/BEECH 56/8 Engine Mount Bolt Nuts 8/70\n\nApplicability: All models with S/Nos. TG64 and subsequent. Requirement:  Action in accordance with Beechcraft SI No. 0396-241. Compliance:               Within 25 hours’ time in service after 21 August 1970.\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":1512},"content_quality":"ok","complexity_score":1,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope addressing a specific hardware safety defect in specific aircraft models. There is no evidence of scope expansion beyond the original issue regarding engine mount bolt nuts."},"complexity_factors":["Extremely brief directive with no defined terms or interpretation section","Single, specific aircraft model and serial number range","Clear, unambiguous compliance deadline (25 hours time-in-service)","Single external reference to manufacturer instruction with no nested conditions","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"**What this does**\nThis directive mandates safety action for specific Beechcraft aircraft to fix a problem with engine mount bolt nuts (the fasteners that hold the engine to the airframe).\n\n**Who it affects**\nOwners and operators of **Beechcraft 56TC (Turbo Baron) Series aeroplanes** with serial numbers **TG64 and subsequent** (i.e., TG64 and all later serial numbers).\n\n**What you must do**\nYou must follow the manufacturer's instructions in **Beechcraft Service Instruction No. 0396-241** regarding the engine mount bolt nuts.\n\n**When you must do it**\nWithin **25 hours of flight time** after 21 August 1970.\n\n**Why this matters**\nLoose or faulty engine mount hardware could cause the engine to detach from the aircraft during flight. This directive ensures the aircraft remains airworthy and safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts","history":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts/history","analysis":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts/analysis","conflicts":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts/conflicts","importantCases":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts/important-cases","documents":"/api/acts/ad-beech-56-8-engine-mount-bolt-nuts/documents"}}