{"id":"F2006B03746","name":"AD/BEECH 23/32 - Engine Firewall","slug":"ad-beech-23-32-engine-firewall","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43340,"registerId":"commonwealth-F2006B03746-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/32 - Engine Firewall","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 23/32 Engine Firewall 10/76\n\nApplicability: Model A23-19, 19A, M19A and B19 with S/Nos. MB-250 to MB-788; Models B23 and C23 with S/Nos. M-1095 to M-1797;\n\nModels A23-24 and A24 with S/Nos. MA-326 to MA-368; Models A24R and B24R with S/Nos. MC-2 to MC-411.\n\nRequirement: Action in accordance with Beechcraft SI No. 0835-111. Compliance:  Within 100 hours time in service after 29 October 1976.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1630},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted airworthiness directive focused specifically on engine firewall integrity for defined aircraft models, consistent with its original safety purpose."},"complexity_factors":["Single, straightforward operative requirement","References external technical document (Beechcraft Service Instruction No. 0835-111) without reproducing its contents","Specific applicability requires cross-checking aircraft serial numbers","No exceptions, exemptions, or conditional clauses"],"plain_english_summary":"This directive requires owners/operators of certain Beechcraft Musketeer, Sundowner and Sierra (Model 19, 23, 24, specified serials; built ~1962–1976) to have the engine firewall inspected or modified per manufacturer’s Service Instruction No. 0835‑111. The work had to be completed within 100 flight hours after 29 October 1976. It matters because a sound firewall prevents engine fires from spreading into the cabin and protects occupants."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-32-engine-firewall","history":"/api/acts/ad-beech-23-32-engine-firewall/history","analysis":"/api/acts/ad-beech-23-32-engine-firewall/analysis","conflicts":"/api/acts/ad-beech-23-32-engine-firewall/conflicts","importantCases":"/api/acts/ad-beech-23-32-engine-firewall/important-cases","documents":"/api/acts/ad-beech-23-32-engine-firewall/documents"}}