{"id":"F2006B05623","name":"AD/PA-28/66 - Fuel Selector Control System - Modification","slug":"ad-pa-28-66-fuel-selector-control-system-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135271,"registerId":"commonwealth-F2006B05623-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/66 - Fuel Selector Control System - 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-28 Series Aeroplanes\n\n \n\nAD/PA-28/66 Fuel Selector Control System - Modification 7/77\n\nApplicability: Model PA-28-235 with S/Nos. 28-10001 to 28-7310125. Document:  Piper SB No. 376.\n\nCompliance: Within 100 hours time in service after 31 July 1977.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text supplied sets a specific applicability, technical source (Piper SB No. 376) and a 100-hour compliance window. The document contains no information indicating that its scope was changed from an earlier instrument or intent; therefore there is no basis in this text to identify a scope change."},"complexity_factors":["Narrow technical scope limited to a single model and serial-number range (Applicability)","Mandatory reliance on an external technical document (Piper SB No. 376) that is not reproduced in the directive (Document: Piper SB No. 376)","Fixed operational compliance metric tied to hours time-in-service rather than a calendar date (Compliance)","Lack of enforcement, cost, and administrative detail in the text increases interpretive steps for operators (entire document)"],"plain_english_summary":"Owners/operators of Piper PA-28-235 aircraft (S/N 28-10001 through 28-7310125) must have the fuel selector control system modified per Piper Service Bulletin No. 376. Each affected aeroplane must receive the modification within its next 100 hours time‑in‑service after 31 July 1977.\n\nThe owner/operator bears the cost and responsibility to arrange compliance, track hours to meet the window, and rely on the manufacturer’s service bulletin for technical details; the directive does not specify enforcement or recordkeeping."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1977 addressing a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original narrow technical scope."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined applicability criterion (specific serial number range)","Single compliance requirement with clear deadline","No cross-references to other legislation or complex conditional logic","References only one external technical document (Piper SB No. 376)","No nested exceptions or layered definitions"],"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) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Piper PA-28-235 aircraft to modify the **fuel selector control system** (the mechanism pilots use to switch between fuel tanks). The modification must follow instructions in **Piper Service Bulletin No. 376**.\n\n**Who it affects:** Owners and operators of Piper PA-28-235 aircraft with serial numbers ranging from **28-10001 to 28-7310125**.\n\n**Why it matters:** Fuel selector system failures can cause engine stoppage or fuel starvation — a serious flight safety risk. This directive mandates a fix to prevent potential accidents.\n\n**Compliance deadline:** The modification must be completed **within 100 hours of flight time** after 31 July 1977.\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding safety requirements. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification","history":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification/history","analysis":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification/analysis","conflicts":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification/conflicts","importantCases":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification/important-cases","documents":"/api/acts/ad-pa-28-66-fuel-selector-control-system-modification/documents"}}