{"id":"F2006B05387","name":"AD/PA-11/4 - Wing Fuel Tank Cap - Modification","slug":"ad-pa-11-4-wing-fuel-tank-cap-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45995,"registerId":"commonwealth-F2006B05387-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-11/4 - Wing Fuel Tank Cap - 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-11 (Cub) & J3 Series Aeroplanes\n\n \n\nAD/PA-11/4 Wing Fuel Tank Cap - Modification NK\n\nApplicability:  All models. Applicable only if a wing fuel tank cap has been replaced with either tank cap P/N 15296-02 since 1 June 1976 or, tank cap P/N 60707-02 modified as per Piper SB No. 522.\n\n \n\nDocument: Piper SB No. 573.\n\n \n\nCompliance: Within 100 hours time in service after 31 May 1978.\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":2352},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific technical issue with specific fuel tank cap part numbers. The scope remains limited to the original safety concern regarding fuel system integrity on affected Piper aircraft."},"complexity_factors":["Narrow applicability limited to specific aircraft models and two specific part numbers","Single compliance action requiring reference to one external technical document (Piper Service Bulletin No. 573)","Time-based compliance measured in flight hours rather than calendar date","Minimal conditional logic or nested exceptions"],"plain_english_summary":"This Airworthiness Directive (AD) mandates a safety modification for **Piper PA-11 (Cub) and J3 series aircraft** regarding their wing fuel tank caps.\n\n**Who it affects:**\nOwners and operators of these aircraft that have replaced their wing fuel tank caps since 1 June 1976 with either:\n- Part number **15296-02**, or  \n- Part number **60707-02** (modified per Piper Service Bulletin No. 522)\n\n**What you must do:**\nIf your aircraft meets the above criteria, you must perform the modification specified in **Piper Service Bulletin No. 573**. This involves technical changes to ensure the fuel cap seals and vents properly, preventing fuel leaks or contamination.\n\n**When:**\nThe modification must be completed within **100 hours of flight time** after 31 May 1978.\n\n**Why it matters:**\nFuel tank caps that don't seal correctly can lead to fuel loss, fuel contamination, or fire hazards. This directive ensures specific replacement caps meet airworthiness standards for safe operation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification","history":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification/history","analysis":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification/analysis","conflicts":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification/conflicts","importantCases":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification/important-cases","documents":"/api/acts/ad-pa-11-4-wing-fuel-tank-cap-modification/documents"}}