{"id":"F2006B05848","name":"AD/PA-32/51 - Fuel Line - Modification","slug":"ad-pa-32-51-fuel-line-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135872,"registerId":"commonwealth-F2006B05848-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-32/51 - Fuel Line - 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-32/51 Fuel Line - Modification 8/77\n\nApplicability: Model PA-32-260 with S/Nos. 32-01 to 32-7700013. Document:  Piper SB No. 557.\n\nCompliance: Within 100 hours time in service after 31 August 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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1664},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused exclusively on the fuel line modification for the specified Piper aircraft. There is no indication of scope creep; it remains targeted at the original technical safety issue."},"complexity_factors":["Extremely brief document with only three operational sections (Applicability, Document reference, Compliance)","Single applicability criterion limiting scope to one specific aircraft model and serial number range","Single compliance requirement with no conditional exceptions or alternative methods stated","No interpretation section, defined terms, or cross-references to other legislative provisions","Straightforward time-based compliance trigger (100 hours time in service)"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a legally binding safety order issued by the Civil Aviation Safety Authority (CASA) that requires aircraft owners to carry out specific maintenance or modifications.\n\n**Who it affects:** Owners and operators of **Piper PA-32-260 Cherokee Six aeroplanes** with serial numbers from 32-01 to 32-7700013.\n\n**What you must do:** Modify the aircraft's fuel line system following the instructions in **Piper Service Bulletin No. 557**. You must complete this work within **100 hours of flight time** (meaning 100 hours of actual aircraft operation, not calendar days) after 31 August 1977.\n\n**Why it matters:** This directive addresses a specific safety defect in the fuel line system to prevent potential fuel leaks or engine failure, ensuring the aircraft remains airworthy and safe to fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-32-51-fuel-line-modification","history":"/api/acts/ad-pa-32-51-fuel-line-modification/history","analysis":"/api/acts/ad-pa-32-51-fuel-line-modification/analysis","conflicts":"/api/acts/ad-pa-32-51-fuel-line-modification/conflicts","importantCases":"/api/acts/ad-pa-32-51-fuel-line-modification/important-cases","documents":"/api/acts/ad-pa-32-51-fuel-line-modification/documents"}}