{"id":"F2006B10038","name":"AD/G1159/35 - Takeoff Warning System","slug":"ad-g1159-35-takeoff-warning-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55451,"registerId":"commonwealth-F2006B10038-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/G1159/35 - Takeoff Warning System","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)  Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes\n\n \n\nAD/G1159/35 Takeoff Warning System 5/90\n\nApplicability: All model GII and GIIB series aircraft.\n\n \n\nRequirement: Carry out a functional check of the take off warning system in accordance with Gulfstream Aerospace Customer Bulletin No 388 amendment 1 or later revision.\n\n \n\nNote: FAA AD 90-02-05 also refers.\n\n \n\nCompliance: Within 25 hours time in service after 17 May 1990, and thereafter at intervals not exceeding 150 hours time in service.\n\n \n\nBackground: This AD is issued as a result of a recent report of an inoperative take off warning system which if not detected and corrected could result in the aircraft taking off in an unsafe configuration.\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":1877},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating functional checks of the takeoff warning system on Gulfstream GII and GIIB aircraft to address the specific safety risk of undetected system failures."},"complexity_factors":["Single, unambiguous operational requirement","Minimal cross-referencing (only to manufacturer bulletin and related FAA directive)","Simple two-tier compliance schedule (initial check + recurring intervals)","No exceptions, exemptions, or conditional clauses","Narrow applicability limited to two specific aircraft model series"],"plain_english_summary":"This is a safety directive (called an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority for owners and operators of specific Gulfstream business jets (GII and GIIB models).\n\n**What it requires:**\nOperators must perform regular functional checks of the **takeoff warning system** — the safety equipment that alerts pilots if the aircraft isn't properly configured for takeoff (for example, if flaps aren't set correctly or brakes are still engaged).\n\n**Why it matters:**\nIf this warning system is broken, pilots might attempt takeoff in an unsafe configuration without realizing it, potentially causing an accident.\n\n**What must be done:**\n- Perform an initial functional check within 25 hours of flight time after 17 May 1990\n- Repeat the check every 150 hours of flight time thereafter\n- Follow the specific procedures outlined in Gulfstream Aerospace Customer Bulletin No. 388 (or later approved revisions)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-35-takeoff-warning-system","history":"/api/acts/ad-g1159-35-takeoff-warning-system/history","analysis":"/api/acts/ad-g1159-35-takeoff-warning-system/analysis","conflicts":"/api/acts/ad-g1159-35-takeoff-warning-system/conflicts","importantCases":"/api/acts/ad-g1159-35-takeoff-warning-system/important-cases","documents":"/api/acts/ad-g1159-35-takeoff-warning-system/documents"}}