{"id":"F2006B05612","name":"AD/PA-28/55 - Fuel Valve - Replacement","slug":"ad-pa-28-55-fuel-valve-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135236,"registerId":"commonwealth-F2006B05612-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/55 - Fuel Valve - Replacement","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)  Piper PA-28 Series Aeroplanes\n\n \n\nAD/PA-28/55 Fuel Valve - Replacement 3/75\n\nApplicability: Model PA-28-235 with S/Nos. 28-7410094 to 28-7510016. Document:  Piper SB No. 444.\n\nCompliance: Within 100 hours time in service after 31 March 1975.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1949},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This appears to be the original 1975 issuance (indicated by the '3/75' identifier and compliance deadline of 31 March 1975). The scope remains confined to the specific fuel valve replacement on the identified aircraft models as originally mandated, with no evidence of expansion to additional aircraft types or systems."},"complexity_factors":["Document is extremely brief (under 50 words)","No definitions section or interpretation provisions","Single, unambiguous compliance requirement","Narrow applicability limited to specific aircraft serial numbers only","Only one external reference (Piper Service Bulletin No. 444)"],"plain_english_summary":"**What this does:** This airworthiness directive (a mandatory safety order issued by the aviation regulator) requires the replacement of fuel valves on specific Piper Cherokee aircraft.\n\n**Who it affects:** Owners and operators of Piper PA-28-235 aircraft with serial numbers between 28-7410094 and 28-7510016.\n\n**What you must do:** Replace the fuel valve within 100 hours of flight time after 31 March 1975, following the technical instructions in Piper Service Bulletin No. 444.\n\n**Why it matters:** This prevents potential fuel system failures—such as leaks or fuel starvation—that could cause engine stoppage or fire during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-55-fuel-valve-replacement","history":"/api/acts/ad-pa-28-55-fuel-valve-replacement/history","analysis":"/api/acts/ad-pa-28-55-fuel-valve-replacement/analysis","conflicts":"/api/acts/ad-pa-28-55-fuel-valve-replacement/conflicts","importantCases":"/api/acts/ad-pa-28-55-fuel-valve-replacement/important-cases","documents":"/api/acts/ad-pa-28-55-fuel-valve-replacement/documents"}}