{"id":"F2006B10079","name":"AD/G159/35 - Fuselage Top Escape Hatch Structure - Inspection","slug":"ad-g159-35-fuselage-top-escape-hatch-structure-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55533,"registerId":"commonwealth-F2006B10079-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/35 - Fuselage Top Escape Hatch Structure - Inspection","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 ORDERS CIVIL AVIATION SAFETY AUTHORITY                            PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES\n\n \n\nAD/G159/35 Fuselage Top Escape Hatch Structure - Inspection 1/79\n\nApplicability: All models G159.\n\n \n\nDocument: Grumman American Customer Bulletin No. 305. Compliance:  As per requirement document.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on escape hatch inspections for one aircraft type. It has not expanded beyond its original purpose — it does exactly what its title suggests and nothing more."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies entirely on external reference (Grumman American Customer Bulletin No. 305)","No conditional logic, exceptions, or nested provisions","Simple applicability clause ('All models G159') with no exclusions or sub-categories","Single compliance pathway with no alternatives or phased implementation","No cross-references to other legislation, CASA regulations, or Civil Aviation Orders beyond the standard header"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Gulfstream (formerly Grumman) G.159 series aircraft** to inspect the **fuselage top escape hatch structure**.\n\n**What it does:**\n- Mandates a specific structural inspection of the emergency escape hatch located on the top of the aircraft fuselage\n- Requires compliance with **Grumman American Customer Bulletin No. 305** — a technical document from the manufacturer detailing exactly how to perform the inspection\n\n**Who it affects:**\n- All owners, operators, and maintenance organisations responsible for **any model of G.159 aircraft** (a twin-turboprop aircraft, also known as the Gulfstream I)\n\n**Why it matters:**\n- Escape hatches are critical safety equipment — they must function properly during emergencies\n- Structural failures in these hatches could prevent evacuation or cause depressurisation issues\n- Non-compliance means the aircraft cannot legally fly in Australian airspace\n\n**Key point:** The directive itself doesn't spell out the inspection steps — it simply says \"do what the manufacturer says in Bulletin No. 305.\" This is common in aviation safety regulation, where the technical details are left to manufacturer documentation."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied directive text applies to all G.159 models and references Grumman American Customer Bulletin No. 305 for the inspection requirements. The text contains no indication of a change from a prior scope or of amendments; based solely on the instrument text provided, there is no evident change in scope from any earlier statement within this document."},"complexity_factors":["Directive text is very short and mechanically simple (requires an inspection) which reduces intrinsic complexity.","The substantive technical requirements are contained in an external document (Grumman American Customer Bulletin No. 305), increasing practical complexity for implementers who must obtain and interpret that document.","Applicability to all models of G.159 is broad but unambiguous, simplifying scope determination.","Lack of procedural detail in the directive means reliance on regulator or maintenance organisation interpretation for enforcement, adding procedural and compliance uncertainty.","Potential operational complexity from scheduling inspections, managing downtime, and any corrective actions identified by the bulletin."],"plain_english_summary":"This directive, issued by the Civil Aviation Safety Authority, requires owners and operators of Gulfstream (Grumman) G.159 series aeroplanes to inspect the fuselage top escape hatch structure in accordance with Grumman American Customer Bulletin No. 305. It affects aircraft owners, operators and maintenance personnel who must obtain and follow the manufacturer bulletin to comply, incurring inspection time, potential repair costs and dependence on the external document for procedures and enforcement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection","history":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection/history","analysis":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection/analysis","conflicts":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection/conflicts","importantCases":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection/important-cases","documents":"/api/acts/ad-g159-35-fuselage-top-escape-hatch-structure-inspection/documents"}}