{"id":"F2009L00673","name":"AD/AS 355/91 Amdt 2 - Upper and Lower Fins of Stabilisers - CANCELLED","slug":"ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77591,"registerId":"commonwealth-F2009L00673-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 355 (Twin Ecureuil) Series","sectionType":"division","heading":"Eurocopter AS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 355/91 Amdt 2 | Upper and Lower Fins of Stabilisers | 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 355/91 Amdt 2","sectionType":"part","heading":"AD/AS 355/91 Amdt 2","content":"## AD/AS 355/91 Amdt 2","sortOrder":1},{"sectionNumber":"Upper and Lower Fins of Stabilisers","sectionType":"part","heading":"Upper and Lower Fins of Stabilisers","content":"## Upper and Lower Fins of Stabilisers","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":2841},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has shifted from imposing active airworthiness requirements to serving solely as a cancellation notice. The original directive mandated specific actions regarding stabiliser fins; this version terminates those requirements and consolidates them into AD/AS 355/98 Amdt 1, effectively nullifying the regulatory scope of the original instrument."},"complexity_factors":["Single operative provision (cancellation only)","No conditional logic, exceptions, or technical standards in the text","Only one cross-reference (to the replacement directive)","Extremely short substantive content (under 100 words)","No defined terms or interpretive sections"],"plain_english_summary":"This cancels a prior airworthiness directive for Eurocopter AS355 upper and lower tail fins, affecting owners, operators and maintenance engineers of those helicopters. As of 26 Feb 2009 the requirements have been transferred into the consolidated AD/AS 355/98 Amendment 1 to avoid duplicate or conflicting rules and keep operators following the current safety standard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled","history":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled/history","analysis":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled/analysis","conflicts":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled/conflicts","importantCases":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled/important-cases","documents":"/api/acts/ad-as-355-91-amdt-2-upper-and-lower-fins-of-stabilisers-cancelled/documents"}}