{"id":"F2009L03920","name":"AD/BELL 412/11 - Main Rotor Yoke, P/N 412-010-101-123 - Inspection - CANCELLED","slug":"ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81299,"registerId":"commonwealth-F2009L03920-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 412 Series Helicopters","content":"### Bell Helicopter Textron 412 Series Helicopters\n\n| AD/BELL 412/11 | Main Rotor Yoke,P/N 412-010-101-123 - Inspection | 12/2009 |\n| -------------- | ------------------------------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                             |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 19 November 2009.                                                                                                                                              |\n| Background:  | This unique Australian AD specified a once-only inspection of the main rotor yoke in accordance with Alert SB 412-85-19 within 100 hours after May 1985. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n30 September 2009","sortOrder":0},{"sectionNumber":"AD/BELL 412/11","sectionType":"part","heading":"AD/BELL 412/11","content":"## AD/BELL 412/11","sortOrder":1},{"sectionNumber":"Main Rotor Yoke,P/N 412-010-101-123 - In","sectionType":"part","heading":"Main Rotor Yoke,P/N 412-010-101-123 - Inspection","content":"## Main Rotor Yoke,  \nP/N 412-010-101-123 - Inspection","sortOrder":2},{"sectionNumber":"12/2009","sectionType":"part","heading":"12/2009","content":"## 12/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2016},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument serves a narrow, specific purpose: to cancel a previous airworthiness directive. The scope is limited to revoking the inspection requirement and matches the original intent of the instrument. It has not expanded beyond its initial purpose."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","No cross-references to other legislation beyond historical background"],"plain_english_summary":"**What this document does**\n\nThis official notice cancels a previous safety inspection requirement for Bell 412 helicopters.\n\n**What was cancelled**\n\nOriginally, owners and operators had to perform a **one-time inspection of the main rotor yoke** (part number 412-010-101-123) — the component that holds the rotor blades — within 100 hours of flight time after May 1985. The inspection followed guidelines in Alert Service Bulletin 412-85-19.\n\n**What happens now**\n\nAs of **19 November 2009**, helicopter operators no longer need to perform this specific inspection. The requirement has been permanently removed.\n\n**Who issued this**\n\nThe Civil Aviation Safety Authority (CASA), the Australian government body responsible for aviation safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled","history":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled/history","analysis":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled/analysis","conflicts":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled/important-cases","documents":"/api/acts/ad-bell-412-11-main-rotor-yoke-p-n-412-010-101-123-inspection-cancelled/documents"}}