{"id":"F2008L02653","name":"AD/PA-31/15 - Alternator Field Fuse - Installation - CANCELLED","slug":"ad-pa-31-15-alternator-field-fuse-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74690,"registerId":"commonwealth-F2008L02653-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/15 | Alternator Field Fuse - Installation | 8/2008 |\n| ----------- | ------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                         |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                                              |\n| Background:  | This unique Australian AD required installation of a fuse in the alternator field circuit. The AD required compliance within 200 hours TIS after March 1971. This requirement was not based on a manufacturer’s service instruction. 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-31/15","sectionType":"part","heading":"AD/PA-31/15","content":"## AD/PA-31/15","sortOrder":1},{"sectionNumber":"Alternator Field Fuse - Installation","sectionType":"part","heading":"Alternator Field Fuse - Installation","content":"## Alternator Field Fuse - Installation","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":1591},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The cancellation aligns with the original intent of the directive. The AD was designed to ensure fuse installation across the fleet; once all aircraft were modified, the instrument was terminated as planned rather than expanding beyond its original safety purpose."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to external legislation","No conditional logic, exceptions, or procedural requirements"],"plain_english_summary":"**What this does:** This document officially cancels a previous safety rule (Airworthiness Directive AD/PA-31/15) that required owners of **Piper PA-31 series aircraft** to install a fuse in the alternator field circuit.\n\n**Who it affects:** Owners and operators of these specific Piper aircraft, though the practical effect is to remove a compliance obligation rather than add one.\n\n**Why it matters:** The original rule required the fuse installation to prevent electrical system failures. Because all affected aircraft have now been modified as required, the Civil Aviation Safety Authority (CASA) is cancelling the directive to remove unnecessary regulatory burden. As of **31 July 2008**, compliance with this specific fuse installation requirement is no longer mandatory."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled","history":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled/history","analysis":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-31-15-alternator-field-fuse-installation-cancelled/documents"}}