{"id":"F2006B10077","name":"AD/G159/33 - Main Entry Door - Inspection","slug":"ad-g159-33-main-entry-door-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55528,"registerId":"commonwealth-F2006B10077-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/33 - Main Entry Door - 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/G159/33 Main Entry Door - Inspection 1/79\n\nApplicability: All models F159.\n\n \n\nDocument: Grumman American Customer Bulletin No. 307. Compliance: As per the 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 main entry door inspections for one aircraft type. It represents the standard, narrow scope typical of individual ADs."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section — uses plain language","No conditional logic or nested exceptions","Single incorporation by reference to external technical document (Grumman American Customer Bulletin No. 307)","Simple applicability clause ('All models F159')","No cross-references to other legislation or CASA regulations"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\n- Requires owners and operators of **Gulfstream (Grumman) G.159 series aeroplanes** to inspect the **main entry door** on their aircraft.\n- The specific inspection requirements are found in **Grumman American Customer Bulletin No. 307** — the AD simply makes compliance with that bulletin legally mandatory.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains **Grumman G.159 aircraft** (all models starting with F159).\n\n**Why it matters:**\n- Airworthiness Directives are **legally binding safety orders**. If you don't comply, your aircraft is considered unairworthy and cannot legally fly.\n- This particular directive addresses potential safety issues with the main entry door — a critical component for passenger safety and cabin pressurization.\n\n**Key point:** The AD itself is brief because it \"incorporates by reference\" the detailed technical requirements from the manufacturer's bulletin. You must obtain and follow that bulletin to comply."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD’s scope is to require inspection of the main entry door on Gulfstream (Grumman) G.159 (F159) aircraft and explicitly applies to all F159 models. The instrument delegates technical requirements to Grumman American Customer Bulletin No. 307 and mandates compliance “as per the requirement document.” There is no text in the supplied instrument indicating a change from that scope; therefore the scope has not changed from the directive’s apparent original intent (Applicability: All models F159; Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document)."},"complexity_factors":["Short, single-issue directive focused on one component (main entry door).","Applicability is simple and explicit (all models F159).","Technical detail is not in the AD text but delegated to an external manufacturer bulletin (Grumman American Customer Bulletin No. 307), which adds an external dependency.","No timelines, inspection intervals or corrective actions provided in the AD text itself (requires consulting the bulletin).","Enforcement and compliance mechanisms follow standard AD practice (regulator issues AD; operator must comply), so procedural complexity is low but operational complexity depends on the bulletin."],"plain_english_summary":"What this instrument does (mechanically)\n\n- Requires inspection of the main entry door on Gulfstream (Grumman) G.159 series aeroplanes. (AD/G159/33 — Main Entry Door - Inspection)\n- The directive applies to all F159 models. (Applicability: All models F159)\n- The detailed inspection requirements and how to comply are set out in the manufacturer document referenced: Grumman American Customer Bulletin No. 307. Compliance must be carried out “as per the requirement document.” (Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document.)\n\nWho is affected and who decides\n\n- Owners and operators of Gulfstream (Grumman) G.159 (F159) aircraft are the parties required to take action because the directive applies to those aircraft. (Applicability: All models F159)\n- The Civil Aviation Safety Authority issues the airworthiness directive (Part 105 — Schedule of Airworthiness Directives) and enforces compliance; the AD itself refers the technical steps to the manufacturer bulletin. (Part 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES; Document: Grumman American Customer Bulletin No. 307.)\n\nWho pays, incentives and behaviour changes\n\n- The financial and operational costs of carrying out the inspection (labour, any replacement parts, and any aircraft downtime needed to perform the inspection) will fall on the aircraft owner/operator because the AD makes compliance their responsibility. (Applicability: All models F159; Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document.)\n- The immediate incentive for owners/operators is regulatory compliance: to meet the AD they must follow the steps in the referenced bulletin. The AD channels technical prescription to the manufacturer document rather than setting the technical steps in the AD text itself. (Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document.)\n\nCompliance burden, discretion and implementation mechanics\n\n- The AD does not set inspection detail, intervals or corrective actions in its text; those technical specifics are delegated to the referenced manufacturer bulletin. That means the practical compliance burden (time, procedures, parts) depends on the bulletin’s contents. (Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document.)\n- Enforcement and determination that the inspection has been carried out rests with the regulator under the AD framework, but the operational content is supplied by the manufacturer’s bulletin. (Part 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES; Document: Grumman American Customer Bulletin No. 307.)\n\nTrade-offs and implementation risks (mechanisms, not judgments)\n\n- Because the AD defers technical specifics to an external bulletin, operators must obtain, interpret and follow that external document to comply. This creates a dependency on the bulletin: if the bulletin requires extensive work, that increases direct costs and potential aircraft downtime; if it is minimal, costs are smaller. (Document: Grumman American Customer Bulletin No. 307. Compliance: As per the requirement document.)\n- The AD centralises the compliance requirement (the regulator issues the directive) while decentralising the technical content (the manufacturer supplies the procedure). That split determines who makes technical choices (manufacturer) and who enforces compliance (regulator). (Part 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES; Document: Grumman American Customer Bulletin No. 307.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-33-main-entry-door-inspection","history":"/api/acts/ad-g159-33-main-entry-door-inspection/history","analysis":"/api/acts/ad-g159-33-main-entry-door-inspection/analysis","conflicts":"/api/acts/ad-g159-33-main-entry-door-inspection/conflicts","importantCases":"/api/acts/ad-g159-33-main-entry-door-inspection/important-cases","documents":"/api/acts/ad-g159-33-main-entry-door-inspection/documents"}}