{"id":"F2008L02494","name":"AD/PA-31/1 - Nose Landing Gear Idler Link Assembly - Modification - CANCELLED","slug":"ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74447,"registerId":"commonwealth-F2008L02494-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/1 | Nose Landing Gear IdlerLink Assembly - 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 modification of the NLG idler link assembly in accordance with Piper SL No. 492 Part II. The AD required compliance by January 1968, so all affected aircraft will have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n13 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/1","sectionType":"part","heading":"AD/PA-31/1","content":"## AD/PA-31/1","sortOrder":1},{"sectionNumber":"Nose Landing Gear IdlerLink Assembly - M","sectionType":"part","heading":"Nose Landing Gear IdlerLink Assembly - Modification","content":"## Nose Landing Gear Idler  \nLink Assembly - 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":1744},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This document performs its intended limited function of revoking a superseded airworthiness directive. The scope has not expanded beyond the specific cancellation of AD/PA-31/1."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic, exceptions, or procedural requirements","Document consists almost entirely of background explanation rather than substantive obligations"],"plain_english_summary":"This document **formally cancels an obsolete aviation safety rule** (Airworthiness Directive AD/PA-31/1) that applied to Piper PA-31 series aircraft.\n\n**What the original rule required:**\nOwners had to modify the nose landing gear idler link assembly — a specific component of the front landing gear — following manufacturer instructions (Piper Service Letter No. 492 Part II).\n\n**Why it is being cancelled:**\nThe original rule required all modifications to be completed by January 1968. Since all affected aircraft would have been modified decades ago, the rule no longer serves any safety purpose and has become redundant.\n\n**Who this affects:**\nOwners and operators of Piper PA-31 aeroplanes. In practice, this cancellation simply removes a technical requirement that everyone already complied with long ago, simplifying maintenance records."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled","history":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-1-nose-landing-gear-idler-link-assembly-modification-cancelled/documents"}}