{"id":"F2006B05507","name":"AD/PA-23/80 - Fuel Line and Electrical Harness - Inspection","slug":"ad-pa-23-80-fuel-line-and-electrical-harness-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46361,"registerId":"commonwealth-F2006B05507-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/80 - Fuel Line and Electrical Harness - 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-23/80 Fuel Line and Electrical Harness - Inspection 12/79\n\nApplicability: All Model PA-23-250 with S/Nos. 27-2505 to 27-7954119. Document:  Piper SB No. 663.\n\nCompliance: Within 100 hours time in service after 31 December 1979.\n\n \n\nBackground:  There have been incidents overseas of inflight nacelle fires and fuel leakage due to chafing between the main electrical harness and fuel lines aft of the firewall.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1678},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive remains tightly focused on its original purpose: addressing a specific mechanical defect (chafing between fuel lines and electrical harness) in a defined aircraft model. The scope has not expanded beyond this targeted safety intervention."},"complexity_factors":["Single, unambiguous compliance action (visual inspection)","Narrow applicability limited to specific aircraft model and serial number range","No conditional logic, exceptions, or exemptions","Straightforward deadline calculation (flight hours after fixed date)","Minimal cross-referencing (only to manufacturer Service Bulletin 663)"],"plain_english_summary":"**What this law does**\n\nThis rule requires owners of specific Piper Apache and Aztec aircraft to inspect the fuel lines and electrical wiring located behind the engine firewall.\n\n**Who it affects**\n- Owners and operators of Piper PA-23-250 model aircraft with serial numbers between 27-2505 and 27-7954119\n\n**What must be done**\n- Inspect the area where the main electrical wiring rubs against fuel lines (this rubbing is called \"chafing\")\n- Complete the inspection within 100 hours of flight time after 31 December 1979\n- Follow the procedures in Piper Service Bulletin No. 663\n\n**Why it matters**\nOverseas incidents showed that when electrical wires rub against fuel lines, it can wear holes in the fuel lines causing leaks, and potentially start in-flight engine compartment fires. This safety directive prevents those dangerous situations by mandating an inspection to catch the problem before it causes an accident."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection","history":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection/history","analysis":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection/analysis","conflicts":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection/conflicts","importantCases":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection/important-cases","documents":"/api/acts/ad-pa-23-80-fuel-line-and-electrical-harness-inspection/documents"}}