{"id":"F2006B03181","name":"AD/B747/287 - Drip Shield and Supports above Rudder Pedal Mechanism","slug":"ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42553,"registerId":"commonwealth-F2006B03181-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/287 - Drip Shield and Supports above Rudder Pedal Mechanism","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.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.\n\nBoeing 747 Series Aeroplanes\n\nAD/B747/287 Drip Shield and Supports above Rudder Pedal\n\nMechanism\n\n  \n3/2003\n\nApplicability: Model 747-400 and \\-400D series aircraft, as listed in Boeing Service Bulletin 747-25A3271 Revision 1 dated 19 December 2001.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2003-02-02 Amdt 39-13018.\n\nCompliance: As specified in the Requirement document for the initial and repetitive inspections, with a revised effective date of 20 March 2003.\n\nThis Airworthiness Directive becomes effective on 20 March 2003.\n\nBackground: This Directive requires inspections to detect discrepancies of the drip shield and supports located above the rudder pedals. The inspections and eventual terminating action specified by this Directive are intended to prevent unrestrained drip shields from interfering with the rudder pedal mechanism, which could result in reduced controllability of the aircraft.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 7 February 2003\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific mechanical defect in a specific aircraft type. It does not expand beyond the original safety concern of drip shield interference with rudder pedals."},"complexity_factors":["Very short document (1 page)","Only 4 defined structural sections (Applicability, Requirement, Compliance, Background)","Single cross-reference to external FAA document for technical details","No nested exceptions or conditional logic — straightforward mandate to follow another regulator's instructions","Minimal defined terms (only specific aircraft models and document references)"],"plain_english_summary":"This CASA Airworthiness Directive requires inspections and corrective action for the drip shield and its supports above the rudder pedals on Boeing 747-400 and 747-400D aircraft, following FAA AD 2003-02-02 and Boeing Service Bulletin 747-25A3271 Rev 1. It affects owners/operators of those models because a loose or failed drip shield could fall and jam the rudder pedals, risking loss of rudder control; inspections continue until a terminating fix is installed."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No. The AD’s applicability and mandated inspections align with the stated safety purpose to detect and correct discrepancies of the drip shield and supports to prevent interference with the rudder pedal mechanism (Background; Applicability; Requirement). The instrument adopts FAA and Boeing technical instructions and sets compliance timing (Compliance) but does not indicate an expansion beyond that safety objective."},"complexity_factors":["Cross-reference to external mandatory documents: FAA AD 2003-02-02 and Boeing Service Bulletin 747-25A3271 Rev 1 (Requirement; Applicability)","Technical inspection and corrective-action tasks that require maintenance access above rudder pedals (Background; Requirement)","Repetitive inspection cadence and existence of a terminating action option (Compliance; Requirement)","Narrow aircraft applicability (specific 747-400/-400D fleet) but safety-critical control system implications (Applicability; Background)","Regulatory provenance: CASA delegate issuing under CAR 1998 subregulation 39.1(1), requiring operators to follow foreign authority instructions adopted by reference (opening paragraph; Requirement)"],"plain_english_summary":"This Airworthiness Directive mandates inspections and corrective action for the drip shield and its supports located above the rudder pedals on Boeing 747‑400 and ‑400D aeroplanes to prevent an unrestrained drip shield from interfering with the rudder‑pedal mechanism and reducing controllability. \n\nOperators of the affected aircraft must carry out inspections and any terminating repairs in accordance with FAA AD 2003‑02‑02 and Boeing Service Bulletin 747‑25A3271 Rev 1 by the compliance dates (effective 20 March 2003); operators bear the inspection and repair costs and must comply under CASA’s regulatory authority (Applicability; Requirement; Compliance; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism","history":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism/history","analysis":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism/analysis","conflicts":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism/conflicts","importantCases":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism/important-cases","documents":"/api/acts/ad-b747-287-drip-shield-and-supports-above-rudder-pedal-mechanism/documents"}}