{"id":"F2006B10060","name":"AD/G159/16 - Engine Breather Overheat Detector - Max Setting","slug":"ad-g159-16-engine-breather-overheat-detector-max-setting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55505,"registerId":"commonwealth-F2006B10060-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G159/16 - Engine Breather Overheat Detector - Max Setting","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/G159/16 Engine Breather Overheat Detector - Max Setting 11/71\n\nApplicability: All models.\n\n \n\nRequirement: Set engine breather overheat detector setting to operate at a temperature not exceeding 260oC.\n\n \n\nNote: Rolls Royce Notice to Operators No. 1018, Issue 3 also refers to this subject.\n\n \n\nCompliance: Before 30 November 1971.\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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, one-off safety directive from 1971 with a narrow, specific purpose. There is no indication of scope creep; it addresses exactly what it says it does — a temperature setting for a specific aircraft component."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section","Single, unambiguous requirement with clear numerical threshold (260°C)","No cross-references to other legislation or complex conditional logic","Simple applicability statement ('All models')","Single compliance date with no exceptions or alternative methods"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) for a specific type of aircraft: the **Gulfstream G.159** (originally made by Grumman). It requires owners and operators to adjust a safety device called the **engine breather overheat detector** so that it triggers an alarm or warning if the temperature reaches **260 degrees Celsius or lower**. This is a fire-prevention measure — the detector warns if the engine's breather system (which vents gases and pressure from the engine) gets dangerously hot. The directive had to be completed **before 30 November 1971**. The note mentions that Rolls Royce also issued guidance on this issue."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive sets a specific technical limit for the engine breather overheat detector and applies to all models of the G.159 series. The source shows no language expanding or narrowing the affected population or the technical requirement beyond the single numeric limit; therefore the scope as expressed in this instrument does not appear to have changed from its stated operative content. (Applicability) (Requirement)"},"complexity_factors":["Single, numerically specified technical requirement (≤260°C) reduces interpretive complexity (Requirement).","Narrow applicability (all models of a single aircraft series) simplifies scope (Applicability).","Fixed, explicit compliance deadline reduces scheduling ambiguity (Compliance).","Absence of procedural detail (no method specified for achieving the setting) creates practical uncertainty and reliance on external technical material (Note).","Cross-reference to an external manufacturer/operator notice increases dependency on another document for implementation detail (Note)."],"plain_english_summary":"The Civil Aviation Safety Authority requires operators of all Gulfstream (Grumman) G.159 series aeroplanes to ensure the engine breather overheat detector is set to operate at no more than 260°C by 30 November 1971. The directive is a mandatory airworthiness requirement; operators should consult Rolls Royce Notice to Operators No. 1018, Issue 3 for related technical guidance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting","history":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting/history","analysis":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting/analysis","conflicts":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting/conflicts","importantCases":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting/important-cases","documents":"/api/acts/ad-g159-16-engine-breather-overheat-detector-max-setting/documents"}}