{"id":"F2008L02646","name":"AD/PA-31/43 - Alternate Air Door Magnetic Catch - Replacement/Modification - CANCELLED","slug":"ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74683,"registerId":"commonwealth-F2008L02646-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series Aeroplanes","content":"### Piper PA-31 Series Aeroplanes\n\n| AD/PA-31/43 | Alternate Air Door MagneticCatch - Replacement/Modification | 8/2008 |\n| ----------- | ----------------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                  |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                       |\n| Background:  | This unique Australian AD required once-only replacement or modification of the magnetic catch on the alternate air door in accordance with Piper SB No. 479B. The AD required compliance before August 1976. All affected aircraft have now been modified. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/43","sectionType":"part","heading":"AD/PA-31/43","content":"## AD/PA-31/43","sortOrder":1},{"sectionNumber":"Alternate Air Door MagneticCatch - Repla","sectionType":"part","heading":"Alternate Air Door MagneticCatch - Replacement/Modification","content":"## Alternate Air Door Magnetic  \nCatch - Replacement/Modification","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2213},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the scope entirely by cancelling the previous directive, rather than expanding it. It reflects that the original safety issue has been fully resolved across the affected fleet."},"complexity_factors":["Single operative provision (cancellation)","No defined terms, cross-references, or conditional logic","Extremely short operative text (under 50 words)","No exceptions or nested requirements"],"plain_english_summary":"**What this does:** This instrument cancels (revokes) Airworthiness Directive AD/PA-31/43, which previously required owners of Piper PA-31 aircraft to replace or modify the magnetic catch on the alternate air door.\n\n**Who it affects:** Owners and operators of Piper PA-31 series aircraft, though the cancellation is largely procedural because all affected aircraft had already been modified by the time this instrument took effect.\n\n**Why it matters:** It formally removes an obsolete compliance requirement. The original directive mandated a one-time fix according to the manufacturer’s service bulletin; since the Civil Aviation Safety Authority confirmed every affected plane had already been modified, the rule is no longer legally binding."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled","history":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-43-alternate-air-door-magnetic-catch-replacement-modification-cancelled/documents"}}