{"id":"F2006B05811","name":"AD/PA-32/18 - Fuel Selector Valve - Modification","slug":"ad-pa-32-18-fuel-selector-valve-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135756,"registerId":"commonwealth-F2006B05811-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-32/18 - Fuel Selector Valve - 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)  Piper PA-32 (Cherokee Six) Series Aeroplanes\n\n \n\nAD/PA-32/18 Fuel Selector Valve - Modification 8/70\n\nApplicability: All models with S/Nos. as listed in Piper SB No. 311. Document:  Piper SB No. 311.\n\nCompliance: Within 100 hours time in service after 31 August 1970.\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":1840},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This appears to be the original 1970 issuance of the directive. It maintains its original narrow scope addressing a specific mechanical defect (fuel selector valve) in a particular aircraft type (Piper PA-32). There is no evidence of scope creep or expansion beyond the initial safety modification requirement."},"complexity_factors":["Very short directive with a single compliance requirement","Technical specifications incorporated by reference to Piper Service Bulletin No. 311 rather than detailed in the legislation","Simple applicability criteria (specific aircraft model and serial numbers)","Clear, unambiguous deadline with no conditional exceptions or alternative compliance methods"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order that requires aircraft owners to fix specific mechanical defects.\n\n**Who it affects:** Owners and operators of **Piper PA-32 (Cherokee Six)** series aeroplanes with serial numbers listed in Piper Service Bulletin No. 311.\n\n**What you must do:** Modify the aircraft's fuel selector valve following the technical instructions in **Piper Service Bulletin No. 311**.\n\n**When:** Complete the work within **100 hours of flight time** (counted when the aircraft is actually flying) after **31 August 1970**.\n\n**Why it matters:** This fixes a safety defect in the fuel selector valve. If ignored, the valve could fail, potentially causing fuel starvation and engine failure during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification","history":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification/history","analysis":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification/analysis","conflicts":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification/conflicts","importantCases":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification/important-cases","documents":"/api/acts/ad-pa-32-18-fuel-selector-valve-modification/documents"}}