{"id":"F2009L03804","name":"AD/BELL 212/56 - Tailboom Doubler - CANCELLED","slug":"ad-bell-212-56-tailboom-doubler-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81035,"registerId":"commonwealth-F2009L03804-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 212 Series Helic","sectionType":"division","heading":"Bell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 212/56 | Tailboom Doubler | 12/2009 |\n| -------------- | ---------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 19 November 2009.                                                                                                                                                                                                                                                                     |\n| Background:  | This unique Australian AD specified action in accordance with Bell AlertSB 212-93-85. A detailed visual internal inspection of the tailboom doubler was specified at intervals not exceeding 100 hours time in service until terminating action which was required by May 1996. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 September 2009","sortOrder":0},{"sectionNumber":"AD/BELL 212/56","sectionType":"part","heading":"AD/BELL 212/56","content":"## AD/BELL 212/56","sortOrder":1},{"sectionNumber":"Tailboom Doubler","sectionType":"part","heading":"Tailboom Doubler","content":"## Tailboom Doubler","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":2066},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates existing regulatory obligations without expanding or modifying the scope. It removes the inspection requirements for the Bell 212 tailboom doubler but does not introduce new regulatory coverage or alter the class of affected aircraft."},"complexity_factors":["Single operative provision: cancellation only","No definitions section or interpretive provisions","No conditional logic, exceptions, or procedural steps","Minimal cross-referencing (only refers to the previous directive and original manufacturer service bulletin)"],"plain_english_summary":"**What this does:** This document officially cancels a previous safety inspection rule for Bell 212 helicopters in Australia.\n\n**The cancelled rule:** Previously, owners had to conduct detailed internal visual inspections of the **tailboom doubler** (a structural reinforcement plate inside the helicopter's tail section) every 100 hours of flight time. This was to detect potential structural failures.\n\n**Why it's cancelled:** The original directive required a permanent fix (called \"terminating action\") to be completed by May 1996. Since that deadline has long passed and the safety issue has been addressed fleet-wide, the ongoing inspection requirement is now unnecessary.\n\n**Who is affected:** Owners and operators of Bell Helicopter Textron 212 series aircraft registered in Australia. They are no longer required to perform these specific inspections or comply with the superseded directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled","history":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled/history","analysis":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled/analysis","conflicts":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled/conflicts","importantCases":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled/important-cases","documents":"/api/acts/ad-bell-212-56-tailboom-doubler-cancelled/documents"}}