{"id":"F2006B04816","name":"AD/BUSHBY M2/2 Amdt 1 - Sta 114.75 Bulkhead Member P/N 240.339","slug":"ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44614,"registerId":"commonwealth-F2006B04816-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BUSHBY M2/2 Amdt 1 - Sta 114.75 Bulkhead Member P/N 240.339","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)  Bushby Mustang II Series Aeroplanes\n\n \n\n# AD/BUSHBY M2/2\n\nAmdt 1\n\nApplicability: All models.\n\n# Sta 114.75 Bulkhead Member P/N 240.339 9/90\n\n \n\nRequirement: Action in accordance with Bushby Aircraft Inc. Mandatory Mustang II Service Bulletin dated 15 March 1989, or alternate scheme approved by the Authority.\n\n \n\nCompliance: Unless previously accomplished - prior to exceeding 100 hours time in service after 25 January 1990.\n\n \n\nBackground: Bushby Aircraft Inc. considers modification mandatory. Excessive back stick pressure during ground operation causes flexing of bulkhead which can lead to cracking at rivet locations. Amendment 1 considers alternate schemes that may be approved by the Authority.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1784},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment does not expand the scope beyond the original intent. It remains focused on the same specific bulkhead member on the same aircraft type. Amendment 1 merely introduces flexibility in compliance methods by permitting alternate repair schemes approved by the Authority, rather than mandating only the manufacturer's service bulletin."},"complexity_factors":["Single, clearly identified aircraft type (Bushby Mustang II Series)","Refers to external technical document (Service Bulletin) for implementation details rather than embedding technical specifications","Simple time-based compliance trigger (100 hours time in service)","Minimal conditional logic (only exemption is 'unless previously accomplished')","No nested definitions or cross-references to other legislative provisions"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of Bushby Mustang II aircraft to inspect and modify the station 114.75 bulkhead (PN 240.339) to prevent cracking caused by excessive back-stick pressure, following the manufacturer’s March 1989 Service Bulletin or a CASA‑approved alternative. Work must be done before accumulating 100 flight hours after 25 January 1990. Amendment 1 permits CASA‑approved alternative repair schemes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339","history":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339/history","analysis":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339/analysis","conflicts":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339/conflicts","importantCases":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339/important-cases","documents":"/api/acts/ad-bushby-m2-2-amdt-1-sta-114-75-bulkhead-member-p-n-240-339/documents"}}