{"id":"F2006B05404","name":"AD/PA-20/13 - Wing Fuel Tank Cap - Modification","slug":"ad-pa-20-13-wing-fuel-tank-cap-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46044,"registerId":"commonwealth-F2006B05404-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-20/13 - Wing Fuel Tank Cap -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-20 (Pacer) Series Aeroplanes\n\n \n\nAD/PA-20/13 Wing Fuel Tank Cap - Modification 3/78\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":1622},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow technical scope regarding fuel tank cap modifications for the Piper PA-20 series. It has not expanded beyond the specific safety issue identified with the identified part numbers."},"complexity_factors":["Extremely short length (single page, four operative paragraphs)","Only one external document reference (Piper Service Bulletin No. 573)","Simple conditional applicability based on part numbers and installation dates","Single, unambiguous compliance deadline","No defined terms, interpretation sections, or nested exceptions"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority that requires aircraft owners to fix a specific defect.\n\n**What it does:** It requires owners of Piper PA-20 (Pacer) aeroplanes to modify their wing fuel tank caps, but **only if** the cap was replaced after 1 June 1976 with either:\n* Part number 15296-02, OR\n* Part number 60707-02 (modified according to Piper Service Bulletin No. 522)\n\n**What you must do:** If your aircraft has one of these caps, you must complete the modification described in **Piper Service Bulletin No. 573** within 100 hours of flight time after 31 May 1978.\n\n**Why it matters:** This addresses a safety defect with specific fuel tank caps that could cause fuel leaks, ventilation problems, or fire hazards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification","history":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification/history","analysis":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification/analysis","conflicts":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification/conflicts","importantCases":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification/important-cases","documents":"/api/acts/ad-pa-20-13-wing-fuel-tank-cap-modification/documents"}}