{"id":"F2006B03751","name":"AD/BEECH 23/37 - Engine Hose Assembly","slug":"ad-beech-23-37-engine-hose-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43345,"registerId":"commonwealth-F2006B03751-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/37 - Engine Hose Assembly","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 19, 23 and 24 Series Aeroplanes\n\n \n\nAD/BEECH 23/37 Engine Hose Assembly 10/78\n\nApplicability: Model B19 with S/Nos. MB-844 to MB-890.\n\nModel C23 with S/Nos. M-1935 to M-2015, M-2017 to M-2029 and M-2031 to M- 2038.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0998. Compliance:  Within 100 hours time in service after 31 October 1978.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1704},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted technical safety directive focused solely on a specific mechanical component (engine hose assembly) in specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, unambiguous maintenance requirement","Limited applicability to specific aircraft models and serial number ranges only","No defined terms or interpretation section","No conditional logic, exceptions, or nested provisions","Only external reference is to a technical service instruction, not other legislative provisions"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order from the Civil Aviation Safety Authority (CASA) requiring specific maintenance on certain aircraft.\n\n**Who it affects:** Owners and operators of specific Beechcraft aeroplanes:\n- **Model B19** with serial numbers MB-844 to MB-890\n- **Model C23** with serial numbers M-1935 to M-2015, M-2017 to M-2029, and M-2031 to M-2038\n\n**What you must do:** Inspect or replace the engine hose assembly following the exact instructions in **Beechcraft Service Instruction No. 0998**.\n\n**Deadline:** Within 100 hours of flight time after 31 October 1978.\n\n**Why it matters:** Airworthiness Directives are legally binding. If you don't complete this action by the deadline, those specific aircraft are no longer considered airworthy and cannot fly legally. This directive addresses a specific safety defect in the engine hose assemblies of these particular planes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-37-engine-hose-assembly","history":"/api/acts/ad-beech-23-37-engine-hose-assembly/history","analysis":"/api/acts/ad-beech-23-37-engine-hose-assembly/analysis","conflicts":"/api/acts/ad-beech-23-37-engine-hose-assembly/conflicts","importantCases":"/api/acts/ad-beech-23-37-engine-hose-assembly/important-cases","documents":"/api/acts/ad-beech-23-37-engine-hose-assembly/documents"}}