{"id":"F2006B05625","name":"AD/PA-28/69 - Engine Cowling - Drain Hole Provision","slug":"ad-pa-28-69-engine-cowling-drain-hole-provision","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135273,"registerId":"commonwealth-F2006B05625-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/69 - Engine Cowling - Drain Hole 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-28 Series Aeroplanes\n\n \n\nAD/PA-28/69 Engine Cowling - Drain Hole Provision 2/78\n\nApplicability: Model PA28-181 with S/Nos. 28-7690001 to 28-7790530.\n\n \n\nModel PA28-235 with S/Nos. 28-10001 to 28-7710046.\n\n \n\nDocument: Piper SB No. 580.\n\n \n\nCompliance: Within 100 hours time in service after 28 February 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":1510},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains focused on its original purpose: ensuring proper engine cowling drainage for specific Piper aircraft models. There is no evidence of scope expansion beyond the specific technical modification required by Piper Service Bulletin No. 580."},"complexity_factors":["Single technical requirement referencing one external document","Narrow applicability limited to specific aircraft models and serial numbers","Simple compliance deadline structure","No conditional provisions, exceptions, or nested definitions"],"plain_english_summary":"**What this does:** This directive requires owners of specific Piper Cherokee aircraft to modify their engine cowlings to include proper drain holes.\n\n**Who it affects:** Owners and operators of:\n- Piper PA-28-181 aircraft (serial numbers 28-7690001 to 28-7790530)\n- Piper PA-28-235 aircraft (serial numbers 28-10001 to 28-7710046)\n\n**What you must do:** Follow the instructions in Piper Service Bulletin No. 580 to ensure your engine cowling has proper drainage holes. This prevents water buildup or overheating issues that could affect engine safety.\n\n**When:** You must complete this work within 100 hours of flight time after 28 February 1978.\n\n**Why it matters:** Drain holes prevent moisture accumulation and help regulate engine temperature. Without them, engines could overheat or suffer corrosion damage."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision","history":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision/history","analysis":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision/analysis","conflicts":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision/conflicts","importantCases":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision/important-cases","documents":"/api/acts/ad-pa-28-69-engine-cowling-drain-hole-provision/documents"}}