{"id":"F2009L00949","name":"AD/PA-46/11 - De-Ice Pressure Control Valve - CANCELLED","slug":"ad-pa-46-11-de-ice-pressure-control-valve-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78442,"registerId":"commonwealth-F2009L00949-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-46 (Malibu) Series Aeroplanes","sectionType":"division","heading":"Piper PA-46 (Malibu) Series Aeroplanes","content":"### Piper PA-46 (Malibu) Series Aeroplanes\n\n| AD/PA-46/11 | De-Ice Pressure Control Valve | 4/2009 |\n| ----------- | ----------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                                      |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 9 April 2009.                                                                                                                                                                                                                                                                                                           |\n| Background:  | This unique Australian AD specified inspection of the de-ice pressure control valve in accordance with Piper SB No. 803A at every 25 and 50 hours time in service until kit Piper Part No. 765-159V and pressure control valve Part No. 845423-805 respectively are installed. The AD has been in force since 1986 so it is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 February 2009","sortOrder":0},{"sectionNumber":"AD/PA-46/11","sectionType":"part","heading":"AD/PA-46/11","content":"## AD/PA-46/11","sortOrder":1},{"sectionNumber":"De-Ice Pressure Control Valve","sectionType":"part","heading":"De-Ice Pressure Control Valve","content":"## De-Ice Pressure Control Valve","sortOrder":2},{"sectionNumber":"4/2009","sectionType":"part","heading":"4/2009","content":"## 4/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2457},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly its intended function: terminating Airworthiness Directive AD/PA-46/11. The scope has not expanded beyond the straightforward cancellation of the previous inspection requirements."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or nested clauses","No cross-references to other legislation (only historical reference to superseded parts and service bulletins)","Extremely short length (under 200 words of substantive content)"],"plain_english_summary":"**What this does:** This document cancels a long-standing aviation safety rule that required regular inspections of the de-icing pressure control valve on Piper PA-46 (Malibu) aircraft. The cancellation takes effect on 9 April 2009.\n\n**Who it affects:** Owners and operators of Piper PA-46 (Malibu) series aeroplanes.\n\n**Why it matters:** Since 1986, these aircraft owners had to inspect a specific valve (which helps prevent ice buildup on the wings) every 25 and 50 hours of flight time. This was meant to be a temporary safety measure until certain replacement parts could be installed. After 23 years, the Civil Aviation Safety Authority determined the inspections are no longer required, removing a recurring maintenance obligation.\n\n**In simple terms:** If you own or operate a Piper Malibu, you can stop performing these specific valve inspections every 25-50 flight hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled","history":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled/history","analysis":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled/analysis","conflicts":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled/conflicts","importantCases":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled/important-cases","documents":"/api/acts/ad-pa-46-11-de-ice-pressure-control-valve-cancelled/documents"}}