{"id":"F2008L01862","name":"AD/PA-28/8 - Rudder Trim Installation - CANCELLED","slug":"ad-pa-28-8-rudder-trim-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74069,"registerId":"commonwealth-F2008L01862-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-28 Series Aeroplanes","sectionType":"division","heading":"Piper PA-28 Series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-28/8 | Rudder Trim Installation | 7/2008 |\n| ---------- | ------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                   |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                         |\n| Background:  | This Directive, issued in 1967, specified Piper SB No. 237 which called for once-only modification of the rudder trim installation. As all affected aircraft would have been inspected, and, if necessary, modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-28/8","sectionType":"part","heading":"AD/PA-28/8","content":"## AD/PA-28/8","sortOrder":1},{"sectionNumber":"Rudder Trim Installation","sectionType":"part","heading":"Rudder Trim Installation","content":"## Rudder Trim Installation","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":2339},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument has not expanded beyond its original purpose. It was originally issued in 1967 to mandate a specific safety modification for PA-28 aircraft rudder trim systems. Having achieved its purpose (all affected aircraft were modified decades ago), it now formally cancels itself. The scope remains strictly limited to the specific aircraft model and component originally addressed."},"complexity_factors":["Single operative provision consisting of one sentence ('This AD is cancelled')","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Historical background provided for context but creates no legal obligations","Total operative text is approximately 20 words"],"plain_english_summary":"**What this does:** This document officially cancels an old aviation safety rule that required owners of Piper PA-28 aircraft to modify their plane's **rudder trim** system (the controls that help keep the plane flying straight without the pilot constantly pushing the foot pedals).\n\n**Who it affects:** Owners and operators of Piper PA-28 series aeroplanes. However, since the original rule was issued in 1967 as a one-time requirement, all affected aircraft have already been inspected and modified long ago.\n\n**Why it matters:** The Civil Aviation Safety Authority cancelled this Airworthiness Directive because the safety work it mandated was completed decades prior. This simply removes an obsolete rule from the aviation regulations, confirming that no further action is required from aircraft owners regarding this specific modification."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled","history":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled/history","analysis":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-28-8-rudder-trim-installation-cancelled/documents"}}