{"id":"F2008L01890","name":"AD/PA-28/81 - Fuel Filter Drain Valve - Replacement - CANCELLED","slug":"ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74118,"registerId":"commonwealth-F2008L01890-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-28 Series Aeroplanes","sectionType":"division","heading":"Piper PA-28 Series Aeroplanes","content":"### Piper PA-28 Series Aeroplanes\n\n| AD/PA-28/81 | Fuel Filter Drain Valve - Replacement | 7/2008 |\n| ----------- | ------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                        |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                              |\n| Background:  | This unique Australian AD required once-only replacement of a fuel filter drain valve. The AD required compliance within 100 hours time in service after May 1981. As all affected aircraft have now been modified this AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n22 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-28/81","sectionType":"part","heading":"AD/PA-28/81","content":"## AD/PA-28/81","sortOrder":1},{"sectionNumber":"Fuel Filter Drain Valve - Replacement","sectionType":"part","heading":"Fuel Filter Drain Valve - Replacement","content":"## Fuel Filter Drain Valve - Replacement","sortOrder":2},{"sectionNumber":"7/2008","sectionType":"part","heading":"7/2008","content":"## 7/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2052},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates regulatory requirements rather than expanding them. The original AD had a narrow scope (fuel filter drain valves on Piper PA-28 aircraft), and this cancellation simply acknowledges that the mandated fleet modification is complete. No scope expansion has occurred; the directive has reached its natural end-of-life."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislative instruments","No conditional logic, exceptions, or procedural requirements","Background provided for context only, not as operative text"],"plain_english_summary":"**What this does:** This document officially scraps a previous aviation safety rule (Airworthiness Directive AD/PA-28/81) that required owners of Piper PA-28 aircraft to replace a specific fuel filter drain valve.\n\n**Who it affects:** Owners and operators of Piper PA-28 series aeroplanes who were previously subject to the 1981 directive.\n\n**Why it matters:** The Civil Aviation Safety Authority (CASA) confirms that every affected aircraft has already been modified, making the original rule redundant. As of 3 July 2008, owners no longer need to comply with this specific replacement requirement or maintain proof of past compliance.\n\n**Background:** The original directive mandated a one-time replacement of the fuel filter drain valve within 100 hours of flying time after May 1981. After 27 years, the regulator recognises the entire fleet has been addressed, so the safety requirement is formally removed from the books."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled","history":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled/history","analysis":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled/analysis","conflicts":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled/important-cases","documents":"/api/acts/ad-pa-28-81-fuel-filter-drain-valve-replacement-cancelled/documents"}}