{"id":"F2009L01848","name":"AD/B-2/10 - Rotor Blade Hinge - Modification - CANCELLED","slug":"ad-b-2-10-rotor-blade-hinge-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78862,"registerId":"commonwealth-F2009L01848-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Brantly B-2 Series Helicopters","sectionType":"division","heading":"Brantly B-2 Series Helicopters","content":"### Brantly B-2 Series Helicopters\n\n| AD/B-2/10 | Rotor Blade Hinge - Modification | 6/2009 |\n| --------- | -------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                        |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 4 June 2009.                                                                                                                                                                                                                                                              |\n| Background:  | This AD, issued in 1960, required modification of the rotor blade hinge in accordance with Brantly SL No. 11 to reduce the compressive stresses during low rotor RPM power-off landings. The AD compliance was forthwith. As all aircraft would have been modified, the AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 April 2009","sortOrder":0},{"sectionNumber":"AD/B-2/10","sectionType":"part","heading":"AD/B-2/10","content":"## AD/B-2/10","sortOrder":1},{"sectionNumber":"Rotor Blade Hinge - Modification","sectionType":"part","heading":"Rotor Blade Hinge - Modification","content":"## Rotor Blade Hinge - Modification","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1498},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has completely eliminated the original regulatory mandate. The 1960 version imposed an immediate, mandatory mechanical modification requirement on all affected aircraft; this 2009 version cancels that obligation entirely, converting the instrument from an active safety directive into a historical archival notice."},"complexity_factors":["Single-page cancellation notice containing only one operative provision","No defined terms, interpretation clauses, or legislative cross-references","No compliance schedules, exceptions, or conditional requirements","Minimal background explanation with no technical implementation details"],"plain_english_summary":"**What this does:** This document officially cancels a 49-year-old safety rule that required owners of Brantly B-2 helicopters to modify their rotor blade hinges.\n\n**Who it affects:** Owners and operators of Brantly B-2 Series Helicopters (though in practice, no one is affected anymore).\n\n**Why it matters:** Back in 1960, the Civil Aviation Safety Authority (CASA) issued an urgent directive requiring helicopter owners to modify their rotor blade hinges. This was to prevent stress damage during emergency landings when the rotor was spinning slowly. Because the required fix was immediate (\"forthwith\") and all affected helicopters have long since been modified, the rule is now obsolete. This cancellation simply removes the dead rule from the aviation safety books."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled","history":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled/history","analysis":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled/analysis","conflicts":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled/conflicts","importantCases":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled/important-cases","documents":"/api/acts/ad-b-2-10-rotor-blade-hinge-modification-cancelled/documents"}}