{"id":"F2009L00501","name":"AD/PA-36/11 - Muffler Clamp - Installation - CANCELLED","slug":"ad-pa-36-11-muffler-clamp-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77136,"registerId":"commonwealth-F2009L00501-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-36 (Pawnee Brave) Series Aeropl","sectionType":"division","heading":"Piper PA-36 (Pawnee Brave) Series Aeroplanes","content":"### Piper PA-36 (Pawnee Brave) Series Aeroplanes\n\n| AD/PA-36/11 | Muffler Clamp - Installation | 3/2009 |\n| ----------- | ---------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                             |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 March 2009.                                                                                                                                                 |\n| Background:  | This unique Australian AD specified installation of a muffler clamp in accordance with Piper SB No. 489 within 100 hours time in service after May 1976. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n8 January 2009","sortOrder":0},{"sectionNumber":"AD/PA-36/11","sectionType":"part","heading":"AD/PA-36/11","content":"## AD/PA-36/11","sortOrder":1},{"sectionNumber":"Muffler Clamp - Installation","sectionType":"part","heading":"Muffler Clamp - Installation","content":"## Muffler Clamp - Installation","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1402},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a straightforward administrative function—cancelling a specific technical requirement for one aircraft type. It does not expand the scope beyond the original AD's purpose or introduce new regulatory concepts."},"complexity_factors":["Single operative provision (cancellation of previous instrument)","No defined terms or interpretation section","Only one external cross-reference (to Piper Service Bulletin No. 489 in background only)","Extremely short (under 150 words of operative text)"],"plain_english_summary":"**What this is:** This document officially cancels a previous aviation safety rule (called an Airworthiness Directive or AD) for specific agricultural aircraft.\n\n**Which aircraft:** Piper PA-36 Pawnee Brave series aeroplanes.\n\n**The old rule:** Previously, owners had to install a specific muffler clamp on these aircraft within 100 hours of flying time after May 1976, following a manufacturer's service bulletin (Piper SB No. 489).\n\n**What changed:** As of 12 March 2009, this requirement is **completely cancelled**. Owners and operators no longer need to install this clamp or comply with this rule because the Civil Aviation Safety Authority (CASA) decided it was no longer necessary for safety.\n\n**Why it matters:** If you own one of these aircraft, you can ignore the previous muffler clamp requirement. However, standard aircraft maintenance rules still apply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled","history":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled/history","analysis":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-36-11-muffler-clamp-installation-cancelled/documents"}}