{"id":"F2006B03161","name":"AD/B747/265 - Passenger Service Units Electrical Wire Bundle Chafing","slug":"ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42533,"registerId":"commonwealth-F2006B03161-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/265 - Passenger Service Units Electrical 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\n \n\n![](image.001.png)\n\n# AIRWORTHINESS DIRECTIVE\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 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\n![](image.001.png)\n\n \n\nBoeing 747 Series Aeroplanes\n\n \n\n# AD/B747/265  Passenger Service Units Electrical Wire Bundle Chafing\n\n\n2/2002\n\n \n\nApplicability: Model 747 series aeroplanes, as listed in Boeing Alert Service Bulletin (ASB) 747- 35A2035, Revision 1, dated 22 July 1999.\n\n \n\nRequirement: 1. Perform a detailed visual inspection for chafing between oxygen hoses and electrical wire bundles at the passenger service units (PSU) in the main deck passenger compartment, upper deck sculpted ceiling, personnel accommodation (crew rest) area, lower lobe forward galley, and aft galley. Inspections are to be performed in accordance with ASB 747-35A2035, Revision 1, as revised by Boeing Service Bulletin Information Notice 747-35A2035 IN 01, dated 23 September 1999.\n\n \n\nNote 1: For the purposes of this Directive, a detailed visual inspection is defined as: \"An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”\n\n \n\n2.        If, as a result of the Requirement 1 inspection, any discrepancies are detected, complete any necessary repairs as specified in Requirement 2.a. and/or 2.b., as applicable. Additionally, reroute the oxygen hose or install an elbow at the oxygen mask inlet connector to reorient the oxygen hose away from the electrical wiring to ensure a minimum of 2 inches clearance between the oxygen hose and electrical wire bundle, in accordance with ASB 747-35A2035, Revision 1.\n\n \n\n1. If any chafing of an oxygen hose is found - Replace the chafed oxygen hose with a new oxygen hose, and install protective sleeving over the new oxygen hose, in accordance with ASB 747-35A2035, Revision 1.\n\n\n \n\nb.        If any chafing of a wire bundle is found - Repair the wire bundle in accordance with ASB 747-35A2035, Revision 1.\n\n \n\nInspections and follow-on actions accomplished prior to the effective date of this Directive in accordance with Boeing SB 747-35-2035, dated 7 January 1983, are acceptable for compliance with corresponding actions of this Directive.\n\n \n\nNote 2: FAA AD 2001-24-29 Amdt 39-12546 refers.\n\n \n\nBoeing 747 Series Aeroplanes\n\n \n\nAD/B747/265 (continued)\n\n \n\nCompliance: For Requirement 1 - Before 16 July 2003.\n\n \n\nFor Requirement 2 - Before further flight following the Requirement 1 inspection. This Airworthiness Directive becomes effective on 21 February 2002.\n\nBackground:  This Directive requires a one-time inspection for chafing between the hose for the passenger oxygen system (hereinafter called the \"oxygen hose'') and adjacent electrical wire bundles at certain passenger service units and, if necessary, corrective actions. The Directive also requires rerouting or reorienting the oxygen hose to ensure sufficient clearance between the hose and electrical wire bundles.\n\n \n\nThese actions are necessary to prevent chafing between the oxygen hose and adjacent electrical wire bundles, which could result in arcing of a chafed electrical wire bundle and consequent burn-through of the oxygen hose. If this occurs when the oxygen system is pressurized, such arcing could represent a potential ignition source in an oxygen-enriched environment.\n\n![Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\n\n \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 14 January 2002\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![](image.001.png)  \n\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.\n","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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific unsafe condition (oxygen hose/electrical wire chafing) in specific aircraft locations, exactly as intended when issued. There is no evidence of scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single-issue directive focused on one specific mechanical problem (wire chafing)","Clear two-part structure: inspection (Requirement 1) and conditional repair (Requirement 2)","Only 2 defined terms (detailed visual inspection in Note 1, 'oxygen hose' in Background)","Straightforward compliance dates with no cascading or conditional timelines","Single cross-reference to FAA AD for background context only (Note 2)","Limited applicability (specific Boeing 747 models covered by one service bulletin)","No nested exceptions or complex conditional logic - repairs are simply 'if found, then fix'"],"plain_english_summary":"This CASA safety order requires operators of certain Boeing 747s (per Boeing ASB 747-35A2035 Rev 1) to inspect passenger-cabin oxygen hoses and nearby electrical wiring for chafing and to correct any damage before the aircraft next flies. It targets a fire risk where worn hoses rubbing on live wiring could produce sparks in an oxygen-rich area; fixes include replacing or protecting hoses and repairing or re‑routing wiring to eliminate the hazard."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive maintains a one‑time inspection and corrective‑action scope for the specified Boeing 747 series and expressly accepts prior inspections done under Boeing SB 747‑35‑2035 (dated 7 Jan 1983). It does not broaden applicability beyond the aeroplane models listed in the cited ASB; it mainly sets specific actions, standards and deadlines rather than expanding covered subjects."},"complexity_factors":["Limited technical scope: one‑time visual inspection focused on chafing at specified PSU locations (Requirement 1).","Multiple corrective options: replace hose, install protective sleeving, repair wiring, reroute hose or fit elbow to achieve 2\" clearance (Requirement 2).","Cross‑references to external technical documents: Boeing ASB 747‑35A2035 Revision 1 and Service Bulletin Information Notice (Requirement 1).","Defined inspection standard requiring enhanced lighting and possible cleaning/access procedures (Note 1).","Clear, short compliance timeline with an immediate 'before further flight' requirement for repairs (Compliance).","Provision accepting prior inspections performed under Boeing SB 747‑35‑2035 dated 7 Jan 1983 (compliance equivalence)."],"plain_english_summary":"**What this does:** This Airworthiness Directive orders operators of specified Boeing 747 aeroplanes to carry out a one‑time detailed visual inspection for chafing between passenger oxygen hoses and adjacent electrical wire bundles at defined PSU locations, and to repair, replace or reroute any chafed hoses/wiring to ensure at least 2 inches clearance (Requirement 1–2; Compliance).  \n\n**Who pays and why it matters:** CASA sets the deadlines (before 16 July 2003 and repairs before further flight); operators pay for inspections and corrective work and must follow the cited Boeing service bulletins to reduce risk of arcing and oxygen‑hose burn‑through."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing","history":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing/history","analysis":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing/analysis","conflicts":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing/conflicts","importantCases":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing/important-cases","documents":"/api/acts/ad-b747-265-passenger-service-units-electrical-wire-bundle-chafing/documents"}}