{"id":"F2006B02403","name":"AD/AMD 50/7 Amdt 1 - Nose Gear Shock Absorber","slug":"ad-amd-50-7-amdt-1-nose-gear-shock-absorber","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41646,"registerId":"commonwealth-F2006B02403-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AMD 50/7 Amdt 1 - Nose Gear Shock Absorber","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)  AMD Falcon 50 and 900 Series Aeroplanes\n\n \n\n# AD/AMD 50/7\n\nAmdt 1\n\nApplicability: Falcon 900 aircraft.\n\n# Nose Gear Shock Absorber 11/94\n\n \n\nRequirement: Action in accordance with Dassault Aviation Alert Service Bulletin F900-150.\n\n \n\nNote: DGAC AD 94-098-014(B)R1 refers.\n\n \n\nCompliance: Unless already accomplished, prior to 13 November 1994.\n\n \n\nBackground:  The manufacturer had defined a procedure to check the charge of the low pressure chamber of the nose gear shock absorber. This action was required to prevent the possibility of a gear retraction when the nose gear is not fully extended.\n\n \n\nAmendment 1 is issued in response to a revision of the relevant DGAC AD which requires a modification that is designed to interrupt retraction of the landing gear when the NLG shock absorber is not fully extended.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Original requirement mandated a procedural check of the nose gear low-pressure chamber charge; Amendment 1 expands the mandate to require a modification designed to interrupt gear retraction when the nose gear shock absorber is not fully extended, increasing the work from inspection to a hardware change and raising operator cost and compliance burden."},"complexity_factors":["Narrow applicability (only Falcon 900 aircraft)","Technical maintenance action requiring shop-level work and possible parts","Reliance on a manufacturer service bulletin for required procedure and modification","Fixed compliance deadline (adds scheduling pressure for operators and maintenance providers)","Amendment changed scope from procedural check to a hardware modification","Cross-reference to a foreign regulator's AD (DGAC AD), creating additional regulatory alignment requirements"],"plain_english_summary":"Requires Falcon 900 operators to perform the inspection in Dassault Aviation Alert Service Bulletin F900-150 and, under Amendment 1, to implement a modification that prevents nose-gear retraction unless the shock absorber is fully extended. The stated purpose is to avoid possible retraction when the nose gear is not fully extended. Compliance is mandatory before 13 November 1994; operators bear inspection, modification and maintenance costs and must follow the manufacturer’s service instructions (Requirement: Dassault Aviation Alert Service Bulletin F900-150; Compliance: prior to 13 November 1994)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment stays tightly focused on its original purpose: preventing nose gear retraction on Falcon 900 aircraft. The change from a pressure check to a physical modification is an escalation of the same safety fix, not scope creep."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (DGAC — the French aviation authority)","Single, clear mechanical requirement with no conditional exceptions","No cross-referencing to other legislation beyond a single manufacturer service bulletin","Straightforward amendment structure: original check → upgraded to physical modification"],"plain_english_summary":"This CASA Airworthiness Directive requires Australian operators of Dassault Falcon 900 jets to fit a modification to the nose landing gear that prevents retraction if the shock absorber’s low‑pressure chamber isn’t properly extended. It replaces an earlier pressure‑check requirement to eliminate the risk of the nose gear collapsing on the ground. Compliance was due by 13 November 1994."}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber","history":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber/history","analysis":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber/analysis","conflicts":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber/conflicts","importantCases":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber/important-cases","documents":"/api/acts/ad-amd-50-7-amdt-1-nose-gear-shock-absorber/documents"}}