{"id":"F2008L01844","name":"AD/PA-22/34 - Shimmy Damper - CANCELLED","slug":"ad-pa-22-34-shimmy-damper-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74037,"registerId":"commonwealth-F2008L01844-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-22 (Tri-Pacer and Colt) Series ","sectionType":"division","heading":"Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes","content":"### Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes\n\n| AD/PA-22/34 | Shimmy Damper | 7/2008 |\n| ----------- | ------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                       |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                                                                             |\n| Background:  | This Directive specified once-only replacement of the original model of shimmy damper in accordance with Piper SB No. 324. This Directive was not based on a USA Directive. Piper SB No. 324 was published in 1989 so as all affected aircraft would have been 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\n19 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-22/34","sectionType":"part","heading":"AD/PA-22/34","content":"## AD/PA-22/34","sortOrder":1},{"sectionNumber":"Shimmy Damper","sectionType":"part","heading":"Shimmy Damper","content":"## Shimmy Damper","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":1332},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument entirely revokes the previous Airworthiness Directive without altering or expanding its original scope; it is a straightforward cancellation of the entire instrument."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural requirements","Minimal cross-referencing (only historical reference to manufacturer service bulletin)"],"plain_english_summary":"**What this does:** This document cancels a previous safety rule (Airworthiness Directive AD/PA-22/34) that applied to Piper PA-22 Tri-Pacer and Colt aircraft.\n\n**Who it affects:** Owners and operators of these specific light aircraft.\n\n**What the old rule required:** The original directive required a one-time replacement of the original model **shimmy damper** — a part that prevents the nose wheel from shaking or vibrating during takeoff or landing — in accordance with a manufacturer service bulletin (Piper SB No. 324).\n\n**Why it matters:** The manufacturer issued that service bulletin back in 1989. By 2008, all affected aircraft would have already had the work done, so the safety rule is no longer needed and is formally cancelled as of 3 July 2008. This removes an obsolete compliance burden from aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled","history":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled/history","analysis":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled/analysis","conflicts":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled/conflicts","importantCases":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled/important-cases","documents":"/api/acts/ad-pa-22-34-shimmy-damper-cancelled/documents"}}