{"id":"F2006B03700","name":"AD/BEECH 200/44 Amdt 1 - Rear Fuselage, Stabilisers and Fin Sealing and Draining","slug":"ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43290,"registerId":"commonwealth-F2006B03700-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 200/44 Amdt 1 - Rear Fuselage, Stabilisers and Fin Sealing and Draining","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 200 (Super King Air) Series Aeroplanes\n\nAD/BEECH 200/44\n\nAmdt 1\n\nApplicability: All models.\n\n  \n\nRear Fuselage, Stabilisers and Fin Sealing and Draining\n\n  \n8/89\n\nRequirement: 1. Action in accordance with Beechcraft S.B. 2254, and\n\n2. Drill 4 off, 5mm holes, AFT of the rear pressure bulkhead in the lower fuselage skins as per drawing below.\n\n![Diagram](image.002.png)  \n\nCompliance: 1. Prior to the next inspection for Maintenance Release issue after 10 August 1989 or within 100 hours time in service after 10 August 1989 whichever is the later.\n\n2. Forthwith.\n\nBackground: The Authority has been aware of the freezing problems associated with this aircraft for some time. The initial issue of this Directive introduced drain holes as an Australian modification. The manufacturer has introduced improved sealing with S.B. 2254 to further address the problem.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1907},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment supplements the original directive by adding the manufacturer's Service Bulletin 2254 requirements alongside the existing Australian modification (drain holes). The scope remains tightly focused on the original safety issue—preventing freezing in the rear fuselage and tail sections—and does not expand to unrelated aircraft systems or new operational contexts."},"complexity_factors":["References external technical document (Service Bulletin 2254) containing detailed sealing instructions not reproduced in the directive","Precise technical specifications requiring specific measurements (4 holes, 5mm diameter) and aircraft anatomy references (aft, pressure bulkhead, lower fuselage skins)","Conditional compliance deadline with comparative logic ('whichever is the later')","Aviation jargon requiring domain knowledge (Maintenance Release, time in service, stabilisers, forthwith)"],"plain_english_summary":"This rule applies to Beechcraft 200 (Super King Air) aircraft and requires two corrective actions to stop water entering the rear fuselage and tail that can freeze and affect safety: apply the manufacturer’s sealing procedure in Service Bulletin 2254, and immediately drill four 5mm drainage holes behind the rear pressure bulkhead.\n\nSealing must be done by the next scheduled maintenance after 10 August 1989 or within 100 flight hours, whichever is later."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining","history":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining/history","analysis":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining/analysis","conflicts":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining/conflicts","importantCases":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining/important-cases","documents":"/api/acts/ad-beech-200-44-amdt-1-rear-fuselage-stabilisers-and-fin-sealing-and-draining/documents"}}