{"id":"F2006B03629","name":"AD/BEECH 1900/11 - Fuselage Canted Bulkhead","slug":"ad-beech-1900-11-fuselage-canted-bulkhead","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43219,"registerId":"commonwealth-F2006B03629-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 1900/11 - Fuselage Canted Bulkhead","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 1900 Series Aeroplanes\n\nAD/BEECH 1900/11 Fuselage Canted Bulkhead 7/95\n\nApplicability: Beech model 1900, serial numbers UA-1 to UA-3; 1900C, serial numbers UB-1 to UB-74 and UC-1 to UC-174; 1900D, serial numbers UE-1 to UE-113.\n\nRequirement: Visually inspect the entire surface of the canted bulkhead at fuselage station 588.10, paying attention to the outer flange radius at stringer cut outs, lightening holes and the rudder pulley bracket attach angles. Inspect in accordance with Beechcraft Service Bulletin 2564, Revision 1.\n\nCompliance: Initially inspect before 5000 hours time in service or before 200 hours time in service after 25 May 1995, whichever occurs later.\n\nRe-inspect at intervals not to exceed 600 hours time in service.\n\nInstallation of Kit 129-4005-1 S cancels the inspection requirements of this Directive.\n\nBackground: The manufacturer has received reports of cracks in the canted bulkhead. If the cracks exceed allowable limits the residual strength of the bulkhead may be reduced below the certification requirements. Rudder cable tension may also be affected and rudder power reduced.\n\nFederal Register of Legislative Instruments F2006B03629","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1832},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original scope as a targeted airworthiness inspection requirement for specific Beechcraft 1900 aircraft models regarding canted bulkhead cracks."},"complexity_factors":["References external technical document (Beechcraft Service Bulletin 2564, Revision 1)","Specific applicability limited to enumerated serial number ranges","Technical aviation terminology (fuselage station, stringer cut-outs, lightening holes)","Dual conditional compliance deadline (whichever occurs later)","Alternative compliance method available via specific kit installation"],"plain_english_summary":"This airworthiness order requires owners of specific Beechcraft 1900s to visually inspect the canted bulkhead at fuselage station 588.10 per Beechcraft Service Bulletin 2564, Rev. 1, with focus on flange radii, lightening holes, and pulley-attach areas. The first inspection has defined flight-hour timing and repeats every 600 hours; installing Kit 129-4005-1 S removes the requirement. It responds to discovered cracks that could degrade rudder control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead","history":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead/history","analysis":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead/analysis","conflicts":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead/conflicts","importantCases":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead/important-cases","documents":"/api/acts/ad-beech-1900-11-fuselage-canted-bulkhead/documents"}}