{"id":"F2006B03740","name":"AD/BEECH 23/27 Amdt 1 - Engine Firewall Aluminium Fittings","slug":"ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43333,"registerId":"commonwealth-F2006B03740-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/27 Amdt 1 - Engine Firewall Aluminium Fittings","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 23/27\n\nAmdt 1\n\n\nEngine Firewall Aluminium Fittings 7/76\n\n \n\nApplicability: Models A23-19, 19A and B19 with S/Nos. MB-1 to MB-677; Models 23, A23, A23A, B23 and C23 with S/Nos. M-1 to M1545; Models A23-24 and A24 with S/Nos. MA-1 to MA-368;\n\nModels A24R and B24R with S/Nos. MC-1 to MC-341.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No. 0638-240, Rev. 1. Compliance: Before 1 July 1976.\n\nNote: Compliance with the preceding issue of this Directive satisfied compliance with this issue of the Directive.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1759},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 maintains the original scope addressing engine firewall aluminium fittings on the specified Beechcraft models. The note stating that compliance with the preceding issue satisfies this issue indicates the amendment is administrative (likely updating document references or minor corrections) rather than expanding requirements."},"complexity_factors":["Single operative requirement referencing one external manufacturer document","Specific, enumerated list of affected aircraft models and serial number ranges","Fixed compliance date with no conditional extensions or exceptions","No defined terms or interpretation sections","Simple amendment note indicating backward compatibility with preceding issue"],"plain_english_summary":"This mandatory airworthiness directive requires owners/operators of certain Beechcraft 19/23/24-series aeroplanes (specific models and serial-number ranges) to inspect and, if needed, replace aluminium engine-firewall fittings per Beechcraft Service Instruction No. 0638-240, Rev. 1, to address cracking or corrosion.\n\nCompliance was required by 1 July 1976; prior compliance with the earlier version satisfies this revision."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings","history":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings/history","analysis":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings/analysis","conflicts":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings/conflicts","importantCases":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings/important-cases","documents":"/api/acts/ad-beech-23-27-amdt-1-engine-firewall-aluminium-fittings/documents"}}