{"id":"F2006B03007","name":"AD/B747/106 - Cabin Entertainment System Wire Bundle Chafing","slug":"ad-b747-106-cabin-entertainment-system-wire-bundle-chafing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42366,"registerId":"commonwealth-F2006B03007-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/106 - Cabin Entertainment System Wire Bundle Chafing","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Boeing 747 Series Aeroplanes\n\n \n\nAD/B747/106 Cabin Entertainment System Wire Bundle Chafing 4/92\n\nApplicability: All Boeing 747-400 series aircraft as listed in Boeing Alert Service Bulletin 747- 23A2241 Revision 3.\n\n \n\nRequirement: Action in accordance with Boeing Alert Service Bulletin 747-23A2241 Revision 3.\n\n \n\nNote: FAA AD 91-23-10 also refers.\n\n \n\nCompliance: Prior to 2 April 1993.\n\n \n\nBackground: This AD has been prompted by reports of chafed wires in the advanced cabin entertainment service system (ACESS) wire bundle resulting in short circuits which led to burned wire bundles. This condition, if not corrected, could result in smoke and fire in the passenger cabin.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD applies to the Boeing 747-400 series aircraft listed in the referenced Boeing Alert Service Bulletin and requires action in accordance with that bulletin prior to 2 April 1993. The text does not indicate a change from an earlier or different scope; it sets a corrective requirement limited to the listed aircraft and the ACESS wire-bundle issue described in the Background."},"complexity_factors":["References an external technical document (Boeing Alert Service Bulletin 747-23A2241 Revision 3) for the required work rather than setting out remedial steps in the AD itself (see 'Requirement').","Model-specific applicability tied to the list in the external bulletin (requires checking that bulletin to determine exact affected serials/aircraft) (see 'Applicability').","Technical subject matter (aircraft wiring, chafing, short circuits, fire risk) that requires specialist maintenance skills and inspection procedures (see 'Background').","A firm compliance deadline that can create scheduling pressure for operators (see 'Compliance').","Cross-reference to a parallel foreign regulator action (FAA AD 91-23-10) which may require co-ordination or interpretation across regulatory documents (see 'Note')."],"plain_english_summary":"What this directive does (mechanics)\n\n- The directive (AD/B747/106) requires that the actions described in Boeing Alert Service Bulletin 747-23A2241 Revision 3 be carried out on affected aeroplanes. (See \"Requirement\".)\n- It applies to all Boeing 747-400 series aircraft that are listed in that Boeing Alert Service Bulletin. (See \"Applicability\".)\n- The work must be completed before 2 April 1993. (See \"Compliance\".)\n\nWhy the regulator issued it (stated reason)\n\n- The directive says it was prompted by reports of chafed wires in the advanced cabin entertainment service system (ACESS) wire bundle that produced short circuits and burned wire bundles. The stated safety concern is that, if not corrected, the condition could result in smoke and fire in the passenger cabin. (See \"Background\".)\n- The AD also cross-references FAA AD 91-23-10. (See \"Note\".)\n\nWho decides and who acts\n\n- The Civil Aviation Safety Authority (the issuer of this AD) sets the mandatory requirement by reference to the Boeing Alert Service Bulletin. (See \"Requirement\".)\n- Aircraft owners/operators of the affected 747-400 series are the parties required to ensure the directive is complied with (because the AD applies to those aircraft listed in the service bulletin). (See \"Applicability\" and \"Requirement\".)\n\nWho pays, incentives and compliance burden\n\n- The AD itself does not allocate or describe funding or reimbursement; it prescribes a maintenance/repair action to be performed in accordance with the Boeing Alert Service Bulletin. (See \"Requirement\".)\n- That prescription creates a direct compliance obligation for operators of the listed aircraft and therefore imposes a maintenance task that will require labour, materials and scheduling. The text does not provide cost estimates or specify whether Boeing or another party bears any cost. (See \"Requirement\" and \"Applicability\".)\n\nTrade-offs, opportunity costs and implementation risks\n\n- The directive imposes a near-term deadline (must be done prior to 2 April 1993), which may require operators to schedule work in existing maintenance windows or arrange additional downtime. (See \"Compliance\".)\n- The stated safety risk if left uncorrected is smoke and fire in the passenger cabin; the AD’s corrective action is narrowly targeted at the ACESS wire bundle condition reported. (See \"Background\".)\n- The AD relies on an external technical document (the Boeing Alert Service Bulletin) to describe the specific corrective steps; that reliance concentrates technical decision-making and procedural detail in that external document rather than in the text of the AD itself. (See \"Requirement\".)\n\nEffects on competition, independent providers and private choice\n\n- The AD requires following Boeing’s Alert Service Bulletin for the listed aircraft. The bulletin will define technical steps and therefore will shape how maintenance providers (whether airline in-house teams or independent MROs) carry out the work. The AD does not specify a particular supplier or service provider. (See \"Requirement\" and \"Applicability\".)\n- The AD does not comment on pricing, commercial arrangements or effects on ticket prices; it imposes a compliance obligation that operators will meet through their chosen maintenance arrangements.\n\nConcrete incentives and concentration of costs/benefits\n\n- The safety benefit described is directed at all occupants of affected aircraft (the Background describes the risk of smoke and fire in the passenger cabin). (See \"Background\".)\n- The cost of complying—labour, parts, scheduling—will fall on the operators of the affected fleet; the AD text does not show any subsidy, compensation or reimbursement mechanism. (See \"Requirement\" and \"Applicability\".)\n\nOther implementation notes\n\n- The AD is time-limited by the compliance date and cross-references an FAA AD, indicating alignment with an international regulator’s action. (See \"Compliance\" and \"Note\".)\n\nBottom-line technical description\n\n- This AD makes a mandatory, time-limited requirement that operators of listed Boeing 747-400 series aircraft carry out the corrective/inspection work set out in Boeing Alert Service Bulletin 747-23A2241 Revision 3 to address chafing in the ACESS wire bundle that has been reported to cause shorts and burned wire bundles, with the safety aim of reducing the risk of smoke or fire in the passenger cabin. (See \"Applicability\", \"Requirement\", \"Compliance\" and \"Background\".)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific technical defect. It has not expanded beyond its original purpose of mandating repairs to prevent cabin fires from chafed entertainment system wiring."},"complexity_factors":["Very short document (under 200 words)","Only 4 operative sections: Applicability, Requirement, Note, and Compliance","Single cross-reference to FAA AD 91-23-10 (informational only)","No defined terms section — uses plain technical language","No conditional logic or nested exceptions","Straightforward command structure: identify affected aircraft → do the repair → meet the deadline"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders airlines and aircraft operators to inspect and fix a specific wiring problem on Boeing 747-400 aircraft. The problem involves the **cabin entertainment system wires** rubbing against other parts (called \"chafing\"), which has caused short circuits, burned wires, and could potentially start a fire in the passenger cabin.\n\n**Who must comply:**\nAnyone operating a Boeing 747-400 series aircraft listed in Boeing's technical bulletin 747-23A2241 Revision 3.\n\n**What action is required:**\nOperators must follow the exact repair instructions in Boeing's Alert Service Bulletin 747-23A2241 Revision 3.\n\n**Deadline:**\nThe fix had to be completed before 2 April 1993.\n\n**Why it matters:**\nThis prevents electrical fires in passenger cabins. Chafed wires can spark, smoke, and ignite — obviously dangerous at 35,000 feet with hundreds of passengers on board."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing","history":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing/history","analysis":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing/analysis","conflicts":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing/conflicts","importantCases":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing/important-cases","documents":"/api/acts/ad-b747-106-cabin-entertainment-system-wire-bundle-chafing/documents"}}