{"id":"F2006B05768","name":"AD/PA-31/64 - Fuel Selector Lever Assemblies - Inspection","slug":"ad-pa-31-64-fuel-selector-lever-assemblies-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135627,"registerId":"commonwealth-F2006B05768-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/64 - Fuel Selector Lever Assemblies - Inspection","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-31 Series Aeroplanes\n\n \n\nAD/PA-31/64 Fuel Selector Lever Assemblies - Inspection 4/78\n\nApplicability: Models PA-31 and PA-31-325 with S/Nos. 31-7612040 to 31-7812023, 31-7812025 to 31-7812035, 31-7812038 to 31-7812041 and 31-7812043 to 31-7812047.\n\n \n\nDocument: Piper SB No. 592.\n\n \n\nCompliance: Within 10 hours time in service after 6 March 1978.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited safety directive from 1978. Airworthiness Directives are inherently narrow in scope — they address specific technical defects in specific aircraft. There is no evidence of scope creep; the document remains focused on its original purpose of mandating a single inspection for a specific fuel system component."},"complexity_factors":["Single, specific maintenance task with clear deadline","Narrow applicability limited to specific serial number ranges","No defined terms section or interpretation provisions","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Simple conditional structure: if aircraft matches serial numbers, then inspection required","No exceptions, exemptions, or nested conditions","Total length is approximately 150 words"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners/operators to perform specific maintenance or inspections.\n\n**What it does:** It orders owners of specific **Piper PA-31 series aeroplanes** (twin-engine aircraft commonly used for charter and freight) to inspect their **fuel selector lever assemblies** — the controls that switch between fuel tanks.\n\n**Who it affects:** Only specific aircraft with serial numbers in the listed ranges (manufactured roughly 1976–1978). This is a targeted directive, not fleet-wide.\n\n**Why it matters:** Fuel selector problems can cause engine fuel starvation, potentially leading to dual engine failure. The directive references **Piper Service Bulletin No. 592**, indicating the manufacturer identified a defect requiring urgent attention.\n\n**What must be done:** Operators must complete the inspection within **10 hours of flying time** after 6 March 1978. This is a hard deadline measured by actual aircraft use, not calendar days.\n\n**Key takeaway:** If you own or operate one of these specific Piper aircraft, you cannot legally fly past 10 hours without completing this fuel system inspection."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope, as stated in the text provided, is limited to requiring an inspection of fuel selector lever assemblies for the listed PA-31 and PA-31-325 serial numbers within 10 hours TIS after 6 March 1978 and referencing Piper Service Bulletin No. 592 for the inspection procedure (Applicability; Document; Compliance). There is no indication in the provided text that the scope was altered from that stated requirement."},"complexity_factors":["Narrow, clearly defined applicability by model and serial-number ranges (Applicability).","Single, simple required action (inspection) with a short compliance time (10 hours TIS after 6 March 1978) (Compliance).","Reliance on an external technical document (Piper SB No. 592) for inspection procedure creates potential ambiguity if that document is not available to the operator (Document).","No ongoing or repeated reporting obligations specified in the directive text provided; enforcement and follow-up depend on usual regulatory mechanisms (implicit in header).","Potential practical complexity from arranging maintenance and parts if the inspection identifies defects (implied by Document; Compliance)."],"plain_english_summary":"This airworthiness directive requires a one‑time inspection of fuel selector lever assemblies on specifically listed Piper PA‑31 and PA‑31‑325 aircraft, conducted per Piper Service Bulletin No. 592 within 10 hours’ time in service after 6 March 1978. It affects the owners/operators and maintenance organisations of those serial‑numbered aeroplanes and matters because it addresses an airworthiness concern, creating near‑term cost and scheduling impacts."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection","history":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection/history","analysis":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection/analysis","conflicts":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection/conflicts","importantCases":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection/important-cases","documents":"/api/acts/ad-pa-31-64-fuel-selector-lever-assemblies-inspection/documents"}}