{"id":"F2009L00672","name":"AD/AS 355/84 Amdt 2 - Stabilisers - Upper and Lower Vertical Fin Spars - CANCELLED","slug":"ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77588,"registerId":"commonwealth-F2009L00672-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 355 (Twin Ecureuil) Series","sectionType":"division","heading":"Eurocopter AS 355 (Twin Ecureuil) Series Helicopters","content":"### Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n| AD/AS 355/84 Amdt 2 | Stabilisers - Upper and Lower Vertical Fin Spars | 4/2009 DM |\n| ------------------- | ------------------------------------------------ | --------- |\n\n| Requirement: | CANCELLED.                                                                  |\n| ------------ | --------------------------------------------------------------------------- |\n|              | This AD is cancelled on 26 February 2009.                                   |\n| Background:  | The requirements of this Directive are now contained in AD/AS 355/98 Amdt 1 |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 February 2009","sortOrder":0},{"sectionNumber":"AD/AS 355/84 Amdt 2","sectionType":"part","heading":"AD/AS 355/84 Amdt 2","content":"## AD/AS 355/84 Amdt 2","sortOrder":1},{"sectionNumber":"Stabilisers - Upper and Lower Vertical F","sectionType":"part","heading":"Stabilisers - Upper and Lower Vertical Fin Spars","content":"## Stabilisers - Upper and Lower Vertical Fin Spars","sortOrder":2},{"sectionNumber":"4/2009 DM","sectionType":"part","heading":"4/2009 DM","content":"## 4/2009 DM","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2507},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This amendment eliminates the substantive requirements of the original directive, transferring them to AD/AS 355/98 Amdt 1. While the scope of this specific instrument is now null, this represents administrative consolidation rather than an expansion of regulatory scope."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretive sections","No conditional logic, exceptions, or procedural steps","Document functions purely as an administrative cross-reference"],"plain_english_summary":"**What this is:** This document cancels a previous aviation safety rule (called an *Airworthiness Directive*) that applied to Eurocopter AS 355 helicopter operators.\n\n**What it does:** As of 26 February 2009, the requirements to inspect or repair the **upper and lower vertical fin spars** (the structural beams in the tail fin) are no longer found in this specific directive.\n\n**Who it affects:** Owners and operators of Eurocopter AS 355 (also known as the Twin Ecureuil or Twin Squirrel) series helicopters.\n\n**Why it matters:** The safety requirements haven't disappeared—they've simply been moved to a different rule (**AD/AS 355/98 Amendment 1**) to consolidate overlapping regulations. This cancellation prevents confusion by removing duplicate requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled","history":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled/history","analysis":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled/analysis","conflicts":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled/conflicts","importantCases":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled/important-cases","documents":"/api/acts/ad-as-355-84-amdt-2-stabilisers-upper-and-lower-vertical-fin-spars-cancelled/documents"}}