{"id":"F2006B05600","name":"AD/PA-28/41 - Rapid Throttle Movement - Warning Placard","slug":"ad-pa-28-41-rapid-throttle-movement-warning-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135210,"registerId":"commonwealth-F2006B05600-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/41 - Rapid Throttle Movement - Warning Placard","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-28/41 Rapid Throttle Movement - Warning Placard 5/73\n\nApplicability: Models PA-28-140, -150, -160 and -S-160 fitted with Lycoming 0-320 engines equipped with Marvel Schebler carburettors model MA-4SPA, P/No. IO-3678-32.\n\n \n\nDocument: Piper SL No. 644.\n\n \n\nCompliance: Within 10 hours time in service after 28 November 1972.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1795},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive with a single, specific safety purpose. It has not been expanded or amended beyond its original intent to mandate a warning placard for the specified aircraft configuration."},"complexity_factors":["Single mechanical requirement with no sub-conditions","Narrow applicability limited to four specific aircraft models with defined engine and carburettor combinations","No defined terms or interpretation sections","Straightforward compliance timeframe with no exceptions","Delegates technical specifications to external manufacturer document (Piper SL No. 644)"],"plain_english_summary":"**What this is:** A safety directive requiring owners of specific light aircraft to install a warning label in the cockpit.\n\n**Who it affects:** Owners and operators of Piper PA-28 Cherokee aircraft (models 140, 150, 160 and S-160) powered by Lycoming O-320 engines with Marvel Schebler MA-4SPA carburettors (part number IO-3678-32).\n\n**What it requires:** You must install a warning placard (a physical sign or sticker) cautioning against rapid throttle movement. This addresses a safety risk where sudden changes to engine power settings could cause engine problems—likely fuel starvation or rough running in these specific carburettor models.\n\n**When:** The work must be completed within 10 hours of flight time after 28 November 1972. For aircraft still in service, this remains a mandatory part of their maintenance history.\n\n**Technical details:** The directive references Piper Service Letter No. 644 for the exact wording and placement instructions for the placard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard","history":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard/history","analysis":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard/analysis","conflicts":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard/conflicts","importantCases":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard/important-cases","documents":"/api/acts/ad-pa-28-41-rapid-throttle-movement-warning-placard/documents"}}