{"id":"F2009L03381","name":"AD/BN-2/21 Amdt 1 - Elevator Trim Lever Box Cracking and Loose Rivets - CANCELLED","slug":"ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140968,"registerId":"commonwealth-F2009L03381-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pilatus Britten-Norman BN-2 Series Aerop","sectionType":"division","heading":"Pilatus Britten-Norman BN-2 Series Aeroplanes","content":"### Pilatus Britten-Norman BN-2 Series Aeroplanes\n\n| AD/BN-2/21 Amdt 1 | Elevator Trim Lever BoxCracking and Loose Rivets | 10/2009 |\n| ----------------- | ------------------------------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                         |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                                                                                                                         |\n| Background:  | This AD was originally raised in 1971 and updated in 1986. It required an inspection for cracking and loose rivets in the elevator trim drive lever box assembly. As normal maintenance practices now address the unsafe condition, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n12 August 2009","sortOrder":0},{"sectionNumber":"AD/BN-2/21 Amdt 1","sectionType":"part","heading":"AD/BN-2/21 Amdt 1","content":"## AD/BN-2/21 Amdt 1","sortOrder":1},{"sectionNumber":"Elevator Trim Lever BoxCracking and Loos","sectionType":"part","heading":"Elevator Trim Lever BoxCracking and Loose Rivets","content":"## Elevator Trim Lever Box  \nCracking and Loose Rivets","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1339},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument performs a straightforward cancellation of a specific Airworthiness Directive without expanding, narrowing, or altering the substantive scope of aviation safety regulation."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No cross-references to other legislation","Clear, unambiguous directive language","Minimal background section with straightforward rationale"],"plain_english_summary":"**What this does:** This document officially cancels a previous aviation safety rule (Airworthiness Directive AD/BN-2/21) that required owners of Pilatus Britten-Norman BN-2 aircraft to inspect the elevator trim lever box for cracks and loose rivets.\n\n**Who it affects:** Owners and operators of Pilatus Britten-Norman BN-2 series aircraft (small commuter/twin-engine planes).\n\n**Why it matters:** The safety inspection is no longer legally required because modern routine maintenance practices now catch these issues automatically. This reduces regulatory burden on aircraft operators while maintaining safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled","history":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled/history","analysis":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled/analysis","conflicts":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled/conflicts","importantCases":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled/important-cases","documents":"/api/acts/ad-bn-2-21-amdt-1-elevator-trim-lever-box-cracking-and-loose-rivets-cancelled/documents"}}