{"id":"F2006B05481","name":"AD/PA-23/54 - Wing Tip Fuel Tanks - Extra Drain Provision","slug":"ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46289,"registerId":"commonwealth-F2006B05481-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/54 - Wing Tip Fuel Tanks - Extra Drain Provision","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-23/54 Wing Tip Fuel Tanks - Extra Drain Provision 6/72\n\nApplicability: Model PA-23-250 fitted with Met-Co-Aire wing tip tanks.\n\n \n\nRequirement: Install an additional water drain valve in each wing tip fuel tank in accordance with a scheme approved by the Secretary.\n\n \n\nNote: Incorporation of Jack Brabham Aviation Pty. Ltd. Engineering Order No. JBA/1 is an acceptable means of compliance.\n\n \n\nCompliance: Within 100 hours time in service after 30 June 1972.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2420},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope addressing a specific airworthiness issue (fuel tank drainage) for a defined aircraft type."},"complexity_factors":["Single mechanical modification requirement","Narrow applicability limited to one specific aircraft model with specific aftermarket tanks","No defined terms or interpretation provisions","Direct reference to a specific approved engineering order as a means of compliance"],"plain_english_summary":"This directive mandates a safety modification for specific Piper aircraft to prevent engine failure from water contamination.\n\n**What it requires:** Owners of Piper PA-23-250 aircraft fitted with Met-Co-Aire wing tip tanks must install an additional water drain valve in each wing tip fuel tank.\n\n**Why it matters:** Water can collect in aircraft fuel tanks and cause engine failure. The extra drain valve provides a way to remove this water during pre-flight checks.\n\n**How to comply:** Install the valve following a plan approved by the Secretary (the aviation safety regulator). Using Engineering Order No. JBA/1 from Jack Brabham Aviation Pty. Ltd. is explicitly approved as meeting this requirement.\n\n**Who is affected:** Operators of the specific aircraft model and configuration mentioned.\n\n**Compliance timeframe:** Within 100 hours of flight time after 30 June 1972."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision","history":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision/history","analysis":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision/analysis","conflicts":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision/conflicts","importantCases":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision/important-cases","documents":"/api/acts/ad-pa-23-54-wing-tip-fuel-tanks-extra-drain-provision/documents"}}