{"id":"F2009L03919","name":"AD/BELL 212/51 - Fin To Tail Boom Junction - CANCELLED","slug":"ad-bell-212-51-fin-to-tail-boom-junction-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81296,"registerId":"commonwealth-F2009L03919-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 212 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 212 Series Helicopters","content":"### Bell Helicopter Textron 212 Series Helicopters\n\n| AD/BELL 212/51 | Fin To Tail Boom Junction | 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 fin-to-tailboom junction by May 1992. The AD was issued following discovery of a crack in an Australian Bell 212 helicopter and was not based on a manufacturer’s bulletin. 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 212/51","sectionType":"part","heading":"AD/BELL 212/51","content":"## AD/BELL 212/51","sortOrder":1},{"sectionNumber":"Fin To Tail Boom Junction","sectionType":"part","heading":"Fin To Tail Boom Junction","content":"## Fin To Tail Boom Junction","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":2225},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly as intended: it cancels a superseded airworthiness directive. The scope has not expanded beyond removing the previous inspection requirement."},"complexity_factors":["Single operative clause stating cancellation","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic or exceptions","Extremely short (under 200 words of substance)"],"plain_english_summary":"**What this does**\nThis document officially cancels a previous safety rule (called an *Airworthiness Directive*) that required owners of Bell 212 helicopters to inspect a specific part of the aircraft.\n\n**The old requirement**\nThe cancelled rule required a one-time inspection of the junction where the tail fin connects to the tail boom. This had to be done by May 1992. The rule was created after engineers found a crack in an Australian helicopter and was unique to Australia (not based on manufacturer instructions).\n\n**Why it matters**\nBecause this directive is now cancelled, owners and operators of Bell 212 helicopters no longer need to perform this specific inspection to comply with this rule. The Civil Aviation Safety Authority has determined the safety measure is no longer necessary."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled","history":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled/history","analysis":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled/analysis","conflicts":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled/conflicts","importantCases":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled/important-cases","documents":"/api/acts/ad-bell-212-51-fin-to-tail-boom-junction-cancelled/documents"}}