{"id":"F2006B05567","name":"AD/PA-25/31 - Rapid Throttle Movement - Warning Placard","slug":"ad-pa-25-31-rapid-throttle-movement-warning-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46561,"registerId":"commonwealth-F2006B05567-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-25/31 - Rapid Throttle Movement - Warning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-25 (Pawnee) Series Aeroplanes\n\n \n\nAD/PA-25/31 Rapid Throttle Movement - Warning Placard 5/73\n\nApplicability: Model PA-25 fitted with Lyc. 0-320 engines equipped with Marvel Schebler carburettor model MA-4SPA, P/No. I0-3678-32.\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":1830},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a tight, focused scope addressing a specific safety risk (rapid throttle movement causing engine issues) for a narrowly defined aircraft configuration. There is no indication the requirements have expanded beyond the original safety purpose."},"complexity_factors":["Single, unambiguous compliance action (install placard)","Narrow applicability limited to one aircraft model with specific engine and carburettor combination","No exceptions, exemptions, or conditional provisions","Only one external document reference (Piper Service Letter No. 644)"],"plain_english_summary":"This Airworthiness Directive required owners of certain Piper PA-25 Pawnee aircraft (with Lycoming O-320 engines and Marvel Schebler MA-4SPA carburettors) to install a cockpit warning placard per Piper Service Letter No. 644. The placard cautions against rapid throttle movement, which in this configuration can cause carburettor icing, engine power loss, or stoppage—critical for safe agricultural operations. The directive’s compliance deadline was 10 flight hours after 28 November 1972."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard","history":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard/history","analysis":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard/analysis","conflicts":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard/conflicts","importantCases":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard/important-cases","documents":"/api/acts/ad-pa-25-31-rapid-throttle-movement-warning-placard/documents"}}