{"id":"F2006B02050","name":"AD/AA-5/18 - Circuit Protection Separation - Modification","slug":"ad-aa-5-18-circuit-protection-separation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41272,"registerId":"commonwealth-F2006B02050-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-5/18 - Circuit Protection Separation - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue NK,Aircraft below 5700 kg,Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes,Circuit Protection Separation - Modification,18\ntitle: Airworthiness Directive - AD/AA-5/18 - Circuit Protection Separation - Modification\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 American/ American Aviation) AA-5 Series Aeroplanes\n\n \n\nAD/AA-5/18 Circuit Protection Separation - Modification NK\n\nApplicability: All models.\n\n \n\nRequirement: 1. Disconnect the instrument light supply wire from the NAV/INST fuse and reconnect to a separate protective device.\n\n \n\n2.    Disconnect the strobe light supply wire from the PUMP/STARTER fuse and either stow or, if strobe lights are fitted, reconnect to a separate protective device.\n\n \n\n3.    Reidentify the appropriate fuses and identify the new circuit protective devices. Compliance:              Within 100 hours’ time in service after 28 February 1977.\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":1812},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains precisely focused on its original purpose: mandating circuit separation modifications for AA-5 aircraft electrical systems to eliminate single points of failure in critical flight systems."},"complexity_factors":["Document contains only 3 specific mechanical requirements with no sub-paragraphs","No defined terms, interpretation section, or glossary","Single, unconditional applicability clause ('All models')","Zero cross-references to other legislation, regulations, or technical standards","Simple linear compliance timeframe with no exceptions or extensions"],"plain_english_summary":"Safety rule requiring electrical wiring changes for owners/operators of Gulfstream AA-5 series aircraft (Grumman American Traveler, Cheetah, Tiger). It separates instrument and strobe lighting circuits from navigation, fuel pump and starter power and mandates relabeling fuses to prevent one fault from disabling multiple critical systems. Compliance was due within 100 flight hours after Feb 28, 1977."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification","history":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification/history","analysis":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification/analysis","conflicts":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification/conflicts","importantCases":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification/important-cases","documents":"/api/acts/ad-aa-5-18-circuit-protection-separation-modification/documents"}}