{"id":"F2006B03195","name":"AD/B747/302 - Rudder Feel, Centering & Trim Mechanism","slug":"ad-b747-302-rudder-feel-centering-trim-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42567,"registerId":"commonwealth-F2006B03195-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\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 CASR 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.\n\n![](image.001.png)  \n\nBoeing 747 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B747/302 Rudder Feel, Centering & Tri","sectionType":"part","heading":"AD/B747/302 Rudder Feel, Centering & Trim Mechanism 4/2004","content":"# AD/B747/302 Rudder Feel, Centering & Trim Mechanism 4/2004\n\nApplicability: Model 747-400 and \\-400F series aeroplanes, line numbers 1254 through 1293 inclusive.\n\nRequirement: Replace the feel, centering, and trim mechanism with a new or serviceable rudder feel, centering, and trim mechanism in accordance with Accomplishment Instructions of Boeing Service Bulletin 747-27-2392, dated February 20, 2003.\n\nNote: FAA AD 2003-24-04 Amendment 39-13373 refers.\n\nCompliance: Unless previously accomplished within 36 months after the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 15 April 2004.\n\nBackground: The actions detailed in this Directive are to prevent degradation/loss of rudder feel and centering, which could result in increased pilot workload and could lead to loss of control of the aeroplane.\n\n![Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 4 March 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument sets a specific replacement requirement for identified 747-400/-400F line numbers and cites the Boeing Service Bulletin and FAA AD. There is no textual indication that the Directive broadens or narrows scope from a prior Australian intent; it confines action to the listed aircraft and a 36-month compliance period."},"complexity_factors":["Narrow applicability to specific models and line numbers (Applicability), which simplifies operator identification but requires line-number verification.","Mandatory replacement action tied to a specific manufacturer Service Bulletin (Requirement), creating a technical compliance obligation.","Fixed compliance window of 36 months (Compliance), which sets a clear scheduling constraint for operators.","Safety-critical consequence (Background) increases urgency and may require prioritisation of maintenance resources.","Requirement for a \"new or serviceable\" part raises supply and logistics considerations for operators (Requirement).","Reference to an FAA AD (Note) introduces cross-jurisdictional alignment but no additional Australian requirements in the text.","Issued by CASA delegate (signature), indicating administrative authority and limited discretionary scope in this instrument."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 747-400 and 747-400F aeroplanes (line numbers 1254–1293) to replace the rudder feel, centering and trim mechanism with a new or serviceable unit in accordance with Boeing Service Bulletin 747-27-2392. (Applicability; Requirement)\n\nOperators must complete the replacement within 36 months. The Civil Aviation Safety Authority (CASA) issues the mandate; operators pay for and arrange the work and must follow the technical instructions. The stated purpose is to prevent degradation or loss of rudder feel and centering that could increase pilot workload or lead to loss of control. (Compliance; Background)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific unsafe condition in a defined subset of Boeing 747 aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, clearly defined applicability (specific aircraft line numbers 1254–1293)","Single mandatory action with explicit reference to external technical document (Boeing Service Bulletin)","No defined terms section or interpretation provisions","Simple temporal compliance condition (36 months from effective date)","No nested exceptions, conditional logic, or cross-references to other legislation beyond the FAA reference note","Total length: approximately 250 words"],"plain_english_summary":"This AD requires operators of Boeing 747-400 and 747-400F aircraft (line numbers 1254–1293) to replace the rudder feel, centering and trim mechanism because degradation can cause loss of rudder feedback and centering, increasing pilot workload and risk of loss of control. A mandatory safety action, compliance is required within 36 months of 15 April 2004, per Boeing Service Bulletin 747-27-2392."},"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-b747-302-rudder-feel-centering-trim-mechanism","history":"/api/acts/ad-b747-302-rudder-feel-centering-trim-mechanism/history","analysis":"/api/acts/ad-b747-302-rudder-feel-centering-trim-mechanism/analysis","conflicts":"/api/acts/ad-b747-302-rudder-feel-centering-trim-mechanism/conflicts","importantCases":"/api/acts/ad-b747-302-rudder-feel-centering-trim-mechanism/important-cases","documents":"/api/acts/ad-b747-302-rudder-feel-centering-trim-mechanism/documents"}}