{"id":"F2008L02464","name":"AD/PA-31/104 - Elevator Outboard Hinge Installation - CANCELLED","slug":"ad-pa-31-104-elevator-outboard-hinge-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74407,"registerId":"commonwealth-F2008L02464-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/104 | Elevator Outboard Hinge 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 once-only modification of the elevator outboard hinge in accordance with Piper SB No. 737. The AD required modification before30 June 1982, so all affected aircraft would have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/104","sectionType":"part","heading":"AD/PA-31/104","content":"## AD/PA-31/104","sortOrder":1},{"sectionNumber":"Elevator Outboard Hinge Installation","sectionType":"part","heading":"Elevator Outboard Hinge Installation","content":"## Elevator Outboard Hinge 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":1796},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument does not expand the scope; it terminates the requirement entirely. The original purpose was to mandate a safety modification, and this document simply recognises that the modification was completed by all affected aircraft decades ago, rendering the rule unnecessary."},"complexity_factors":["Single operative provision (cancellation with effective date)","No definitions, interpretation section, or cross-references","No exceptions, conditions, or procedural steps","Document length is approximately 4 sentences of substance"],"plain_english_summary":"This document formally scraps an old aircraft safety rule that required owners of Piper PA-31 series aeroplanes to modify the elevator outboard hinge (the hinge connecting the tail flap to the aircraft body).\n\n**What it is:** An Airworthiness Directive (a mandatory safety notice issued by the aviation regulator) cancellation.\n\n**What the original rule did:** Decades earlier, the Civil Aviation Safety Authority mandated a one-time mechanical fix to prevent the elevator hinge from failing. All affected aircraft had to complete this work by 30 June 1982.\n\n**Why it matters now:** Because every plane covered by this rule was modified over 25 years ago, the requirement is obsolete. This document simply removes the redundant rule from the books effective 31 July 2008, cleaning up the regulatory register."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled","history":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled/history","analysis":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-31-104-elevator-outboard-hinge-installation-cancelled/documents"}}