{"id":"F2006B04339","name":"AD/BELL 204/36 - Tail Rotor Grips","slug":"ad-bell-204-36-tail-rotor-grips","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44154,"registerId":"commonwealth-F2006B04339-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/BELL 204/36 Tail Rotor Grips 8/2000","sectionType":"part","heading":"AD/BELL 204/36 Tail Rotor Grips 8/2000","content":"# AD/BELL 204/36 Tail Rotor Grips 8/2000\n\nApplicability: Model 204B with aluminium tail rotor grips P/N 204-011-728-19 installed. Requirement: Remove the following TR grips from service:\n\n| A3-66287 | A3-66333 | A3-66356 |\n| -------- | -------- | -------- |\n| A3-66361 | A3-66365 | A3-66370 |\n| A3-66377 | A3-67149 | A3-67171 |\n| A3-67184 | A3-67207 |          |\n\nNote: FAA AD 90-03-10 refers.\n\nCompliance: Before further flight after the effective date of this directive.\n\nThis Airworthiness Directive becomes effective on 10 August 2000.\n\nBackground: This directive is issued to preclude the failure of certain tail rotor blade grips and subsequent loss of control of the helicopter. It also follows the re-introduction of the AD Series after sixteen years.\n\n![](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 6 July 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is confined to removing the identified tail-rotor grips from service on Model 204B helicopters fitted with the stated part number. The text does not expand or narrow that mandate beyond the stated safety purpose (to preclude grip failure and possible loss of control)."},"complexity_factors":["Narrow applicability: single helicopter model (204B) and single part number (P/N 204-011-728-19)","Explicit list of affected serial numbers requires operators to inspect records and physical parts to identify matches","Immediate compliance deadline ('Before further flight') increases operational disruption and potential replacement sourcing urgency","Low regulatory discretion: mandatory removal under CAR 1998 subregulation 39.1(1) with no alternative compliance route described","Reference to an external FAA AD (FAA AD 90-03-10) for background but no additional procedural guidance in the text"],"plain_english_summary":"This Airworthiness Directive requires operators of Bell Model 204B helicopters fitted with aluminium tail-rotor grips P/N 204-011-728-19 to remove from service a specific list of grip serial numbers. It is issued by the CASA delegate under CAR 1998 subregulation 39.1(1) and must be complied with before further flight. The directive aims to prevent tail-rotor grip failure and potential loss of control; the immediate compliance timing and replacement obligation create direct costs and operational disruption for affected operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in identified aircraft components. It has not expanded beyond its original purpose of grounding faulty tail rotor grips."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined elements: applicability (specific helicopter model), requirement (list of 11 serial numbers), and compliance deadline","No cross-references to other legislation except a brief note about a related US FAA directive","Single unconditional requirement with no exceptions or nested conditions","Clear, direct language with no technical legal terminology beyond standard aviation abbreviations (TR = tail rotor, P/N = part number, CASA = Civil Aviation Safety Authority)"],"plain_english_summary":"This emergency CASA safety order requires immediate removal from service—before the next flight—of specific aluminium tail rotor grips (PN 204-011-728-19, listed serial numbers) installed on Bell 204B helicopters. It affects owners, operators and maintenance personnel and was effective 10 August 2000 to eliminate a risk of tail-rotor failure and loss of control."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-204-36-tail-rotor-grips","history":"/api/acts/ad-bell-204-36-tail-rotor-grips/history","analysis":"/api/acts/ad-bell-204-36-tail-rotor-grips/analysis","conflicts":"/api/acts/ad-bell-204-36-tail-rotor-grips/conflicts","importantCases":"/api/acts/ad-bell-204-36-tail-rotor-grips/important-cases","documents":"/api/acts/ad-bell-204-36-tail-rotor-grips/documents"}}