{"id":"F2006B03755","name":"AD/BEECH 23/41 - Firewall and FS 68.00 Frame","slug":"ad-beech-23-41-firewall-and-fs-68-00-frame","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43349,"registerId":"commonwealth-F2006B03755-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/41 - Firewall and FS 68.00 Frame","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBeechcraft 19, 23 and 24 Series Aeroplanes\n\nAD/BEECH 23/41 Firewall and FS 68.00 Frame 7/83\n\nApplicability: Models A23-19, 19A, M19A and B19 with S/Nos. MB-1 to MB-520.\n\nModel B19 Sport 150 with S/Nos. MB-521 to MB-905.\n\nModels 23, A23, A23A, B23 and C23 with S/Nos. M-1 to M-1361. Model C23 Sundowner 180 with S/Nos. M-1362 to M-2352.\n\nModels A23-24 and A24 with S/Nos. MA-1 to MA-368. Model A24R with S/Nos. MC-2 to MC-95.\n\nModels A24R, B24R and C24R Sierra 200 with S/Nos. MC-96 to MC-772.\n\nRequirement: Action in accordance with Beechcraft SI No. 1245 Parts I and II.\n\nCompliance: Part I : Within 100 hours time in service after 31 July 1983 and thereafter at intervals not exceeding 100 hours time in service.\n\nPart II: As per Requirement Document.\n\nBackground: The manufacturer reports corrosion in the areas surrounding the firewall and FS 68.00 frame.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1343},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope addressing a specific corrosion issue identified by the manufacturer in 1983. There is no indication of scope expansion beyond the initial safety-critical inspection requirement for the specified airframe components."},"complexity_factors":["Six distinct aircraft model groups with specific serial number cutoffs requiring cross-referencing","Reference to external technical document (Beechcraft Service Instruction No. 1245) without reproducing its contents","Aviation-specific terminology ('time in service', 'firewall', 'FS 68.00 frame') requiring technical knowledge","Split compliance structure with Part I and Part II having different inspection intervals"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain Beechcraft Model 19, 23, and 24 aircraft (specific serial numbers listed in the Applicability) to inspect the firewall and FS 68.00 frame for corrosion. Inspections must be repeated every 100 flight hours and the separate Beechcraft Service Instruction No. 1245 must be followed. The action addresses discovered corrosion that could weaken structure and compromise flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame","history":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame/history","analysis":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame/analysis","conflicts":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame/conflicts","importantCases":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame/important-cases","documents":"/api/acts/ad-beech-23-41-firewall-and-fs-68-00-frame/documents"}}