{"id":"F2008L01518","name":"AD/B747/349 Amdt 1 - Crew Oxygen Cylinder Support","slug":"ad-b747-349-amdt-1-crew-oxygen-cylinder-support","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119918,"registerId":"commonwealth-F2008L01518-current","compilationNumber":null,"startDate":"2026-04-03","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/B747/349 Amdt 1 | Crew Oxygen Cylinder Support | 6/2008 |\n| ------------------ | ---------------------------- | ------ |\n\n| Applicability: | Model 747-400 series aircraft, as identified in Boeing Special Attention Service Bulletin 747-35-2114 Revision 1, or later FAA approved revision.                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2006-12-10 R1 Amdt 39-15485.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 5 June 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Amendment becomes effective on 5 June 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The FAA received a report indicating that certain oxygen cylinder supports may not have been properly heat-treated. The actions required by this Directive are intended to prevent failure of the oxygen cylinder support under the most critical flight load conditions, which could cause the oxygen cylinder to break loose and cause a loss of oxygen for the flight crew. Also, a fire hazard could result from oxygen leakage.Amendment 1 is issued in response to a revision of the related FAA AD, which expands the applicability to include certain aircraft that are not on the US Register. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2008","sortOrder":0},{"sectionNumber":"AD/B747/349 Amdt 1","sectionType":"part","heading":"AD/B747/349 Amdt 1","content":"## AD/B747/349 Amdt 1","sortOrder":1},{"sectionNumber":"Crew Oxygen Cylinder Support","sectionType":"part","heading":"Crew Oxygen Cylinder Support","content":"## Crew Oxygen Cylinder Support","sortOrder":2},{"sectionNumber":"6/2008","sectionType":"part","heading":"6/2008","content":"## 6/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original directive (implied by Amendment 1) was narrower, applying only to US-registered aircraft. This amendment explicitly expands applicability to include aircraft not on the US Register, broadening the safety mandate to cover Australian-registered Boeing 747-400s that were previously outside the scope."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined term implicitly referenced (the Boeing service bulletin)","Single technical requirement: comply with existing FAA directive","No nested exceptions or conditional logic","Straightforward applicability criteria based on aircraft model and service bulletin","Minimal cross-referencing (only to one FAA AD and one Boeing service bulletin)"],"plain_english_summary":"This AD requires inspection and, if needed, repair of cockpit crew oxygen cylinder mounts on certain Boeing 747-400s because some supports may lack proper heat treatment and could fail, risking loss of crew oxygen or a fire. It applies to operators identified in the Boeing service bulletin and follows FAA AD 2006-12-10 R1. The amendment broadens applicability to include some non‑U.S. registered aircraft, including Australian‑registered planes."},"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":true,"description":"Amendment 1 expands the directive's scope beyond the set originally covered by the prior AD by including certain Boeing 747‑400 aircraft that are not on the US Register. The change is stated in the Background and reflected in the Applicability reference to Boeing Special Attention Service Bulletin 747‑35‑2114 Rev 1 (Background; Applicability)."},"complexity_factors":["Cross‑reference to an external FAA AD (FAA AD 2006‑12‑10 R1) rather than full text in the instrument creates dependency on another document for technical detail (Requirement).","Reliance on Boeing Special Attention Service Bulletin 747‑35‑2114 Rev 1 (or later FAA‑approved revision) to identify affected serials and procedures increases implementation steps for operators (Applicability).","Technical inspections and corrective actions are engineering tasks (heat‑treatment/fitment verification) requiring maintenance capability, parts or rework, and certified personnel (Background & Requirement).","Amendment alters scope by adding aircraft not on the US Register, expanding the set of operators who must comply (Background).","Compliance timing and logistics are governed by the referenced documents; CASA's instrument sets the effective date but defers procedural detail to the FAA/Boeing materials (Compliance; Effective date).","Operational costs: affected operators bear inspection/repair costs, potential aircraft downtime and parts sourcing obligations (Applicability; Requirement).","Enforcement and certification follow usual CASA/Delegate processes; the instrument is executed by the CASA delegate (signature block)."],"plain_english_summary":"This directive requires operators of certain Boeing 747‑400 series aeroplanes to carry out the inspections and corrective actions specified in FAA AD 2006‑12‑10 R1, as referenced via Boeing Special Attention Service Bulletin 747‑35‑2114 Rev 1 (or later). It applies to owners/operators listed in that service bulletin, becomes effective 5 June 2008, and—per the background—seeks to prevent failure of crew oxygen cylinder supports (which could cause crew oxygen loss or an oxygen‑fed fire); Amendment 1 widens applicability to some non‑US‑registered aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support","history":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support/history","analysis":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support/analysis","conflicts":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support/conflicts","importantCases":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support/important-cases","documents":"/api/acts/ad-b747-349-amdt-1-crew-oxygen-cylinder-support/documents"}}