{"id":"F2006B08989","name":"AD/DHA-3/6 - Fuel Filter - Modification","slug":"ad-dha-3-6-fuel-filter-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52618,"registerId":"commonwealth-F2006B08989-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/6 - Fuel Filter - Modification","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)  DHA-3 (Drover) Series Aeroplanes\n\n \n\nAD/DHA-3/6 Fuel Filter - Modification 9/53\n\nApplicability: All models.\n\n \n\nRequirement: 1. Remove the two existing main fuel filters (DH. P/N P3/341A) and recouple the fuel lines at these points.\n\n \n\n2.    Install an approved type of fuel filter in each engine nacelle in the fuel line between the firewall and the engine driven fuel pumps.\n\n \n\n3.    The following types of fuel filter are approved for the application referred to in this Order:\n\n \n\n(a)     AGS.600; and\n\n \n\n(b)     American AC Type C-1A.\n\n \n\n(Types other than those specified in this paragraph may be approved on application.) or\n\n \n\n4. ANO 105.1.14.14.5.7.\n\n \n\nCompliance: Forthwith.\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":2531},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow, technical scope focused specifically on fuel filter modification for the DHA-3 aircraft series, consistent with its title and stated applicability to 'All models' of that specific aircraft type."},"complexity_factors":["Very short directive containing only 4 procedural requirements","Minimal cross-referencing (single alternative compliance reference to ANO 105.1.14.14.5.7)","Limited technical specifications (only two explicitly approved filter types)","No defined terms section, interpretive provisions, or nested exceptions","Binary alternative compliance path (follow steps 1-3 OR comply with the ANO)","Immediate compliance requirement eliminates temporal conditional logic"],"plain_english_summary":"Owners and operators of DHA-3 Drover aircraft must immediately modify the fuel system: remove the two existing main fuel filters and install approved replacement filters in each engine nacelle (in the fuel line between the firewall and engine‑driven pumps). Approved parts include AGS.600 or American AC Type C‑1A (other parts only with approval). The change improves filtration to reduce risk of engine failure or fire."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-6-fuel-filter-modification","history":"/api/acts/ad-dha-3-6-fuel-filter-modification/history","analysis":"/api/acts/ad-dha-3-6-fuel-filter-modification/analysis","conflicts":"/api/acts/ad-dha-3-6-fuel-filter-modification/conflicts","importantCases":"/api/acts/ad-dha-3-6-fuel-filter-modification/important-cases","documents":"/api/acts/ad-dha-3-6-fuel-filter-modification/documents"}}