{"id":"F2006B03820","name":"AD/BEECH 35/17 - Tachometer Shaft","slug":"ad-beech-35-17-tachometer-shaft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43416,"registerId":"commonwealth-F2006B03820-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/17 - Tachometer Shaft","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 35 (Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 35/17 Tachometer Shaft NK\n\nApplicability: All models with S/Nos. prior to D4215.\n\n \n\nRequirement:  Action in accordance with Beechcraft SB Model 35 - No. 31; Model A35 - No. 20; Model B35 - No. 13; Model C35 - No. 14; Model D35 - No. 9; Model E35 - No. 8; Model F35 - No. 5.\n\n \n\nCompliance: Forthwith.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1655},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains strictly limited to its original purpose: addressing a specific mechanical defect in the tachometer shaft assembly of defined Beechcraft aircraft models. It has not expanded to cover unrelated systems or aircraft types."},"complexity_factors":["Very short directive with single, unambiguous applicability criterion (serial number range)","No defined terms, interpretation sections, or nested conditional logic","Relies entirely on external technical documents (Service Bulletins) for substantive requirements","Immediate compliance deadline eliminates temporal calculation complexity","No exceptions, exemptions, or alternative compliance pathways stated"],"plain_english_summary":"**What it is:** This is a mandatory safety directive (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) for specific Beechcraft Bonanza aircraft.\n\n**Who it affects:** Owners and operators of Beechcraft 35, A35, B35, C35, D35, E35, and F35 model aeroplanes with serial numbers prior to D4215.\n\n**What it requires:** Aircraft operators must immediately take action to inspect or fix the tachometer shaft (the mechanical component that sends engine speed readings to the cockpit gauge). The specific technical steps are contained in separate Beechcraft Service Bulletins referenced by the directive, rather than being detailed in the legislation itself.\n\n**Why it matters:** The 'Forthwith' (immediate) compliance requirement indicates CASA considers this a critical safety issue. A faulty tachometer shaft could fail in flight, causing the pilot to lose accurate engine speed readings and potentially leading to engine damage or power loss."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-17-tachometer-shaft","history":"/api/acts/ad-beech-35-17-tachometer-shaft/history","analysis":"/api/acts/ad-beech-35-17-tachometer-shaft/analysis","conflicts":"/api/acts/ad-beech-35-17-tachometer-shaft/conflicts","importantCases":"/api/acts/ad-beech-35-17-tachometer-shaft/important-cases","documents":"/api/acts/ad-beech-35-17-tachometer-shaft/documents"}}