{"id":"F2006B05495","name":"AD/PA-23/68 - Fuel Selector Valve - Inspection","slug":"ad-pa-23-68-fuel-selector-valve-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46334,"registerId":"commonwealth-F2006B05495-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/68 - Fuel Selector Valve - 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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/68 Fuel Selector Valve - Inspection 7/75\n\nApplicability: Model PA23-250 with S/Nos. 27-7305127 to 27-7554008, 27-7554010 to 27-\n\n7554069, 27-7554071, 27-7554072, 27-7554075, 27-7554077 to 27-7554080, 27-\n\n7554083, 27-7554087, 27-7554088, 27-7554090, 27-7554092, 27-7554098, 27-\n\n7554100, 27-7554102 and 27-7554104.\n\n \n\nDocument: Piper SB No. 455.\n\n \n\nCompliance: Within 100 hours time in service after 31 July 1975.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1701},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive retains its original narrow scope as a one-time mandatory inspection for a specific mechanical component on specific aircraft models. No evidence of scope creep or expansion beyond the original aviation safety purpose."},"complexity_factors":["Single discrete action required (inspection only)","Straightforward applicability determined by aircraft serial number list","Single external technical reference (Piper SB No. 455) without reproduced content","Simple time-based compliance calculation (100 hours 'time in service' after fixed date)","No exceptions, conditional clauses, or alternative compliance methods"],"plain_english_summary":"**What this is:** A mandatory safety order (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) requiring specific aircraft owners to perform a safety inspection.\n\n**What it requires:** Owners and operators must inspect the fuel selector valve on affected aircraft according to the technical instructions in Piper Service Bulletin No. 455.\n\n**Who it affects:** Only applies to Piper PA-23-250 model aircraft with specific serial numbers listed in the document (including ranges like 27-7305127 to 27-7554008 and various individual numbers).\n\n**When compliance is required:** Within 100 hours of flight time (counted from when the aircraft is airborne) after 31 July 1975.\n\n**Why it matters:** Faulty fuel selector valves can cause engine failure due to fuel starvation or leakage. This inspection prevents potentially catastrophic in-flight emergencies by ensuring the valve mechanism is functioning correctly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection","history":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection/history","analysis":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection/analysis","conflicts":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection/conflicts","importantCases":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection/important-cases","documents":"/api/acts/ad-pa-23-68-fuel-selector-valve-inspection/documents"}}