{"id":"F2006B05616","name":"AD/PA-28/59 - Fuel Selector Valve - Inspection and Replacement","slug":"ad-pa-28-59-fuel-selector-valve-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135252,"registerId":"commonwealth-F2006B05616-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/59 - Fuel Selector Valve - Inspection and 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-28/59 Fuel Selector Valve - Inspection and Replacement 12/76\n\nApplicability: Model PA-28-235 with S/Nos. 28-10001 to 28-761057 fitted with Airborne fuel valve P/N 1-H65-2, (Piper P/N 492-259) by Piper SB No. 444.\n\n \n\nDocument: 1. Piper SB No. 519A; or\n\n \n\n2. FAA AD 76-18-04, Amendment 39-2709.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1976.\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":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The text provides a targeted directive with specific applicability, referenced procedures and a clear compliance deadline. There is no indication within the document that the scope has been altered from an earlier or original intent; it sets out the affected aircraft, the part in question, the documents to be followed, and the required compliance timing."},"complexity_factors":["Narrow, technical applicability tied to specific model, serial-number range and a particular part number (Applicability)","Mandatory compliance with external technical documents (Piper SB No. 519A or FAA AD 76-18-04) that must be obtained and followed (Document)","Fixed compliance window referenced to aircraft time in service and a historical calendar date, requiring accurate time-in-service records (Compliance)","Practical implementation requires record checks to confirm whether the valve was fitted by a prior service bulletin (SB No. 444), adding administrative effort (Applicability)","Low regulatory discretion in the directive itself — it prescribes actions and timing rather than options — but operational execution relies on maintenance organisations and parts supply chains (Document; Compliance)"],"plain_english_summary":"This airworthiness directive mandates inspection—and replacement if needed—of a specific Airborne fuel selector valve (P/N 1-H65-2 / Piper P/N 492-259) installed on certain Piper PA-28-235s, following Piper SB No. 519A or FAA AD 76-18-04, within 100 flight hours after 31 Dec 1976. It affects owners/operators and maintenance organisations of the listed PA-28-235 serials, shifting inspection/replacement costs and scheduling burdens to them to address a safety concern with that valve."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft configuration. It has not expanded beyond its original purpose of ensuring fuel valve integrity on affected Piper aircraft."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 defined elements: specific aircraft model (PA-28-235), serial number range, fuel valve part numbers, and referenced technical documents","Single compliance condition (100 hours time in service after fixed date)","No nested exceptions or conditional logic","No cross-references to other legislation beyond the two technical documents","Straightforward applicability test based on objective criteria (model, serial number, part number)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that mandates a safety inspection and potential replacement of fuel selector valves on specific Piper PA-28 aircraft.\n\n**What it does:**\n- Requires owners/operators of certain Piper PA-28-235 model aircraft to inspect their fuel selector valves\n- If the valve is found to be faulty, it must be replaced\n- The directive applies specifically to aircraft with serial numbers between 28-10001 and 28-761057 that have an Airborne fuel valve (part number 1-H65-2, also known as Piper part number 492-259) installed under Piper Service Bulletin No. 444\n\n**Who it affects:**\n- Owners and operators of Piper PA-28-235 aircraft with the specific serial number range and fuel valve configuration mentioned above\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\nFuel selector valves control which fuel tank supplies the engine. A faulty valve could cause fuel starvation, engine failure, or fire—creating serious safety risks during flight. This directive ensures potentially defective valves are identified and replaced before they cause accidents.\n\n**Compliance deadline:**\nThe work must be completed within 100 hours of flight time after 31 December 1976.\n\n**Technical references:**\nThe directive points to two technical documents for how to perform the inspection and replacement:\n1. Piper Service Bulletin No. 519A, or\n2. FAA Airworthiness Directive 76-18-04, Amendment 39-2709 (the US equivalent regulation)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement","history":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement/history","analysis":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement/important-cases","documents":"/api/acts/ad-pa-28-59-fuel-selector-valve-inspection-and-replacement/documents"}}