{"id":"F2005L02093","name":"AD/B747/330 - Fuel Spar Shutoff Valve Wiring","slug":"ad-b747-330-fuel-spar-shutoff-valve-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36320,"registerId":"commonwealth-F2005L02093-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/330 | Fuel Spar Shutoff Valve Wiring | 9/2005 |\n| ----------- | ------------------------------ | ------ |\n\n| Applicability: | Model 747-400, -400D and -400F series aeroplanes, line numbers 1 through 1276 inclusive.                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Install a jumper wire between the wiring of the fire extinguisher switch and the fuel shutoff switch for each engine in accordance with the Accomplishment Instructions of Boeing Service Bulletin (SB) 747-28-2238, Revision 1, dated 17 March 2005.              |\n|                | Equivalent parts, as determined in accordance with Chapter 20 the Boeing Standard Wiring Practices Manual, may be utilised in lieu of the parts specified in SB747-28-2238, Revision 1.                                                                            |\n|                | Accomplishment of the actions required by this Directive before the effective date of this Directive, in accordance with Boeing Special Attention Service Bulletin747-28-2238, dated 18 October 2001 are considered acceptable for compliance with this Directive. |\n|                | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2005-13-20 are considered acceptable for compliance with the equivalent Requirements of this Directive. |\n|                | Note: FAA AD 2005-13-20 Amdt 39-14157 refers.                                                                                                                                                                                                                      |\n| Compliance:    | Within 60 months after the effective date of this Directive.                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 1 September 2005.                                                                                                                                                                                                |\n\n| Background: | This Directive requires the installation of a jumper wire between the wiring of the fire extinguisher switch and the fuel shutoff switch for each engine. The Directive is issued to prevent a latent open circuit that could leave the fuel spar shutoff valve in a partially open position when the engine fire switch is activated, which could result in fuel from the engine feeding an uncontrolled fire in the engine or the strut. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n19 July 2005","sortOrder":0},{"sectionNumber":"AD/B747/330","sectionType":"part","heading":"AD/B747/330","content":"## AD/B747/330","sortOrder":1},{"sectionNumber":"Fuel Spar Shutoff Valve Wiring","sectionType":"part","heading":"Fuel Spar Shutoff Valve Wiring","content":"## Fuel Spar Shutoff Valve Wiring","sortOrder":2},{"sectionNumber":"9/2005","sectionType":"part","heading":"9/2005","content":"## 9/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope mirrors the FAA-referenced requirement: it targets the same 747-400 series aircraft and mandates the same jumper installation per Boeing SB, while formally recognising prior compliant work and FAA‑approved later SB revisions. No substantive expansion or narrowing of applicability is introduced by this instrument."},"complexity_factors":["Narrow applicability to specific models and a defined range of line numbers (1–1276)","Technical electrical modification requiring adherence to Boeing Service Bulletin 747-28-2238 Rev 1","Allowance for equivalent parts subject to Boeing Standard Wiring Practices Manual Chapter 20 (requires technical judgement)","Acceptance of prior compliance under the 2001 Boeing Special Attention Service Bulletin (administrative tracking)","Acceptance of later SB revisions only if approved as FAA AMOC to FAA AD 2005-13-20 (cross-jurisdictional approval dependency)","60-month compliance window (logistics and scheduling considerations for operators)","Need for coordination/documentation with FAA AD references and potential inspections to verify conformity","Limited regulatory discretion in remedy (specific installation mandated) but room for approved equivalents/AMOCs"],"plain_english_summary":"Requires installation of a jumper wire linking each engine’s fire-extinguisher switch wiring to its fuel-shutoff switch wiring on Boeing 747-400, -400D and -400F aeroplanes (line numbers 1–1276) to prevent a latent open circuit that could leave a fuel spar shutoff partly open during fire-switch activation. Operators (airlines/owners) must install the jumper per Boeing Service Bulletin or approved equivalents/AMOCs within 60 months; earlier compliant work and FAA‑approved later revisions are accepted, creating obligations for parts conformity and regulatory coordination."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific wiring fault in specific aircraft models. The scope remains tightly focused on the original safety issue — preventing fuel valve malfunction during engine fires. The reference to equivalent parts and alternative compliance methods does not expand the substantive scope; these are standard administrative flexibilities for aviation maintenance."},"complexity_factors":["Single technical requirement with clear mechanical action (install jumper wire)","Cross-reference to external Boeing Service Bulletin and FAA Airworthiness Directive","Conditional compliance pathway for operators who completed work under earlier bulletin","Limited defined terms (only 'equivalent parts' with reference to Boeing manual)","No nested exceptions or complex conditional logic","Short, self-contained document with single purpose"],"plain_english_summary":"This CASA Airworthiness Directive mandates installation of a jumper wire between the engine fire extinguisher switch and the fuel shutoff switch on specified Boeing 747-400 series (line numbers 1–1276) to ensure the fuel spar shutoff valve fully closes when the fire switch is used. It prevents fuel from continuing to feed an engine or strut fire.\n\nOwners/operators must comply within 60 months of 1 Sept 2005; equivalent parts or prior approved installations are acceptable."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring","history":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring/history","analysis":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring/analysis","conflicts":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring/conflicts","importantCases":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring/important-cases","documents":"/api/acts/ad-b747-330-fuel-spar-shutoff-valve-wiring/documents"}}