{"id":"F2006B03188","name":"AD/B747/295 - Wing Foreflap Sequence Carriage Clevis Bushings","slug":"ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42560,"registerId":"commonwealth-F2006B03188-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/295 - Wing Foreflap Sequence Carriage Clevis Bushings","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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\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\n\nAD/B747/295 Wing Foreflap Sequence Carriage Clevis\n\nBushings\n\n  \n11/2003\n\nApplicability: Model 747-100, \\-100B, \\-100B SUD, \\-200B, \\-200C, \\-200F, \\-300, \\-400, \\-400D, \\-400F\n\nand 747SR series aircraft; line numbers 1 through 1009, except 968, 999, 1004, and\n\n1007.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2003-16-08 Amdt 39-13261.\n\nNote: Boeing Service Bulletins 747-57-2166 Revision 5 and 747-57-2166 Revision 6 refer.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 30 October 2003.\n\nThis Airworthiness Directive becomes effective on 30 October 2003.\n\nBackground: The FAA received a report of an incident where the foreflap of an inboard trailing edge flap departed the aircraft during flight and collided with the fuselage, resulting in a 5.5-foot by 3-foot hole in the fuselage. This Directive requires inspections of the clevis bushings on the inboard and outboard sequence carriages of the inboard trailing edge foreflaps; and eventual bushing replacement.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 10 September 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 8 October 2003.\n\n  \nPage 1 of 1","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD does not expand the original safety purpose. It implements, for Australian-registered aircraft, the same technical corrective action set out in FAA AD 2003-16-08 (inspections and bushing replacement) to address the foreflap separation hazard. The text adds no new obligations beyond applying the FAA-mandated inspections and replacements to the listed Australian-applicable aircraft (Applicability; Requirement)."},"complexity_factors":["Short standalone AD text (single-page directive)","Cross-reference to FAA AD 2003-16-08 for technical procedures (external dependency)","Reference to Boeing Service Bulletins 747-57-2166 Rev 5 and Rev 6 (additional external documents)","Applicability limited to specific 747 models and specific line-number range with 4 exceptions (simple conditional inclusion/exclusion)","Compliance timing delegated to referenced FAA AD rather than specified in this instrument (reduces internal conditional logic)"],"plain_english_summary":"**What this instrument does (mechanics)\n\n- This is an Airworthiness Directive (AD) that requires Boeing 747 operators to inspect and, where necessary, replace specific clevis bushings on the wing foreflap sequence carriages. (A clevis bushing is a small bearing-like component that helps attach and allow movement of the flap linkage.)\n\n- The AD applies to Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F and 747SR series aircraft with line numbers 1–1009, except line numbers 968, 999, 1004 and 1007. (See \"Applicability\".)\n\n- The required work is to be carried out in accordance with the technical instructions in FAA Airworthiness Directive 2003-16-08 (referenced in the AD). The Boeing service bulletins 747-57-2166 Revision 5 and Revision 6 are also referenced. (See \"Requirement\" and the Note.)\n\n- The AD became effective on 30 October 2003 and compliance timing is as specified in the referenced FAA AD. (See \"Compliance\".)\n\nWhy CASA issued it (stated reason)\n\n- The Background records a reported incident where an inboard foreflap departed the aircraft in flight and struck the fuselage, creating a large hole. The inspections and bushing replacements are required to address the unsafe condition that could allow a foreflap to separate. (See \"Background\".)\n\nWho this affects and who pays\n\n- Airline and aircraft operators that own or operate the listed Boeing 747 variants within the stated line-number range must perform the inspections and any required replacement work. (Applicability; Requirement.)\n\n- The operator bears the direct costs: labour to perform inspections, replacement parts (clevis bushings), potential maintenance-shop charges, and any aircraft downtime while the work is done. Indirect costs may include schedule disruption and possible flight cancellations or re-routing during maintenance.\n\nOperational effect and behaviour change\n\n- Operators must inspect the inboard and outboard sequence carriage clevis bushings for the inboard trailing edge foreflaps and replace bushings as instructed if defects are found. Compliance is mandatory under CASR Part 39 enforcement. (Requirement; Compliance.)\n\n- Maintenance providers (airframe/line maintenance organisations) will carry out the inspections and replacements according to the FAA AD and Boeing service information; operators will need to schedule and document the work to maintain regulatory compliance.\n\nHow the AD is implemented (delegation and discretion)\n\n- The AD implements the FAA-mandated technical solution by reference rather than spelling out all procedural steps; CASA has delegated the technical detail to the FAA AD and Boeing service bulletins. Operators must follow those external documents to meet the CASA requirement. (Requirement; Note.)\n\nTrade-offs, costs and risks (practical testing of the stated purpose)\n\n- Benefit claimed: reduces the risk of foreflap separation in flight by ensuring worn or defective clevis bushings are discovered and replaced. (Background → Requirement.)\n\n- Costs and trade-offs: inspections and replacement consume maintenance labour and parts and may cause aircraft downtime. These are concentrated costs paid by the aircraft operator; the safety benefit (averting a rare but severe event) is more diffuse.\n\n- Implementation risk: the AD cross-references external FAA and Boeing documents. If an operator cannot access or correctly apply those documents, there is a compliance risk. Independent maintenance organisations can perform the work if they follow the referenced procedures, but they must ensure conformity with the FAA AD and Boeing service bulletins.\n\n- Market effect: this is a regulatory compliance cost for affected operators. It does not change market structure, ownership, or contract freedom directly, but it imposes minimum maintenance actions that operators must buy (parts, labour), which may benefit maintenance and parts suppliers. (Requirement; Note.)\n\nPractical note on reading the AD\n\n- The AD itself is short and relies on FAA AD 2003-16-08 and Boeing SB 747-57-2166 Rev 5/6 for the step-by-step inspection and replacement instructions. Operators should consult those documents to find exact inspection intervals, criteria for replacement, and detailed procedures. (Requirement; Note; Compliance.)\n\nSource sections cited: Applicability; Requirement; Note; Compliance; Background."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical failure mode in a defined aircraft population. No scope creep evident."},"complexity_factors":["Short, single-page document with clear structure (Applicability, Requirement, Compliance, Background)","Only 4 defined/model variants listed in applicability section","Single cross-reference to external FAA directive (AD 2003-16-08) and Boeing Service Bulletins","No nested exceptions or conditional logic — straightforward inspection and replacement mandate","Technical aviation terminology requires domain knowledge but document itself is procedurally simple"],"plain_english_summary":"This Airworthiness Directive from CASA mandates inspection and replacement of clevis bushings on the foreflaps of certain Boeing 747s after an FAA report of a flap part falling off in flight and punching a large hole in the fuselage. It affects operators of the listed 747 line numbers and requires compliance with FAA AD 2003-16-08 and Boeing service bulletins, with a compliance date of 30 October 2003."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings","history":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings/history","analysis":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings/analysis","conflicts":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings/conflicts","importantCases":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings/important-cases","documents":"/api/acts/ad-b747-295-wing-foreflap-sequence-carriage-clevis-bushings/documents"}}