{"id":"F2006B05489","name":"AD/PA-23/62 - Engine Lower Air Scoops and Fairings - Fluid Drainage Provision","slug":"ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46315,"registerId":"commonwealth-F2006B05489-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/62 - Engine Lower Air Scoops and Fairings - Fluid Drainage 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\n# AD/PA-23/62 Engine Lower Air Scoops and Fairings - Fluid\n\nDrainage Provision\n\nApplicability: All PA-23 series fitted with Airesearch turbochargers.\n\n# 7/74\n\n \n\nRequirement: Provide drainage holes in the engine lower air scoops and fairings in accordance with Piper SL No. 705.\n\n \n\nCompliance: Within 100 hours time in service after 31 July 1974.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1746},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow, technical scope - a targeted safety modification addressing a specific fluid accumulation hazard in a particular aircraft configuration. No evidence of mission creep or expansion into broader operational requirements."},"complexity_factors":["Single, unambiguous technical requirement with no exceptions or sub-clauses","No defined terms section - uses straightforward technical language","Only one applicability condition (Airesearch turbocharger fitment)","Brief document with minimal cross-referencing (only refers to external Piper Service Letter No. 705)"],"plain_english_summary":"**What this law does:** This rule requires owners and operators of specific Piper aircraft (PA-23 Apache and Aztec models equipped with Airesearch turbochargers) to modify their engine air scoops and fairings by adding drainage holes.\n\n**Why it matters:** Without drainage holes, fluids like oil or fuel can pool in the lower air scoops and fairings, creating a fire risk or potential engine damage. The fix allows these fluids to drain out safely.\n\n**Who must comply:** Anyone operating a PA-23 series aircraft fitted with Airesearch turbochargers.\n\n**What you must do:** Drill or install drainage holes in the engine lower air scoops and fairings following the technical instructions in Piper Service Letter No. 705 (the manufacturer's service bulletin).\n\n**When:** Within 100 hours of flying time after 31 July 1974."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision","history":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision/history","analysis":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision/analysis","conflicts":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision/conflicts","importantCases":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision/important-cases","documents":"/api/acts/ad-pa-23-62-engine-lower-air-scoops-and-fairings-fluid-drainage-provision/documents"}}