{"id":"F2005L01045","name":"AD/B767/209 - Strut Vapour Barrier Seal","slug":"ad-b767-209-strut-vapour-barrier-seal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":34605,"registerId":"commonwealth-F2005L01045-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"division","heading":"Boeing 767 Series Aeroplanes","content":"### Boeing 767 Series Aeroplanes\n\n| AD/B767/209 | Strut Vapour Barrier Seal | 6/2005 |\n| ----------- | ------------------------- | ------ |\n\n| Applicability: | Model 767-200, -300, and -300F series aircraft; equipped with General Electric and Pratt and Whitney engines, as identified in Boeing Service Bulletin 767-54-0107 Revision 1, dated 18 December 2003.                                                                                                                                                                                                                                  |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2005-06-10 Amdt 39-14018.                                                                                                                                                                                                                                                                                                                                                |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of 9 June 2005.                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 9 June 2005.                                                                                                                                                                                                                                                                                                                                                                          |\n| Background:    | The related FAA AD was prompted by a report of a missing section of vapour seal from the spar web cavities of the upper aft struts of both wings, which was discovered during production. This situation, unless corrected, would allow flammable liquids to leak onto parts of a hot exhaust system of a shut-down engine of an aircraft on the ground, and could result in ignition of the flammable liquids and an uncontained fire. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n27 April 2005","sortOrder":0},{"sectionNumber":"AD/B767/209","sectionType":"part","heading":"AD/B767/209","content":"## AD/B767/209","sortOrder":1},{"sectionNumber":"Strut Vapour Barrier Seal","sectionType":"part","heading":"Strut Vapour Barrier Seal","content":"## Strut Vapour Barrier Seal","sortOrder":2},{"sectionNumber":"6/2005","sectionType":"part","heading":"6/2005","content":"## 6/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD adopts and enforces the FAA’s corrective actions for a specific manufacturing/maintenance defect (missing vapour barrier seal). It does not broaden the subject matter beyond that original safety purpose; it simply makes the FAA-prescribed inspection and corrective work mandatory for the identified Australian-registered Boeing 767s. There is no indication in the text that the AD expands scope beyond the FAA AD and the Boeing Service Bulletin’s technical remit."},"complexity_factors":["Short, single-issue AD focused on one component (vapour barrier seal).","Direct incorporation by reference of FAA AD 2005-06-10 rather than long in-text procedures (one external cross-reference).","References a single Boeing Service Bulletin (767-54-0107 Rev 1) for applicability and technical detail (one external service document).","Limited number of affected models and engine types explicitly listed (few applicability permutations).","No nested exceptions or multiple compliance pathways—actions follow the FAA AD's instructions."],"plain_english_summary":"This instrument makes FAA Airworthiness Directive 2005-06-10 mandatory for certain Boeing 767-200/300/300F aeroplanes (per Boeing SB 767-54-0107 Rev 1), requiring inspection and repair or installation of the vapour barrier seal in upper aft wing strut spar web cavities. \n\nIt affects operators, maintainers and parts suppliers by imposing required inspections/repairs (effective 9 June 2005), reducing fire/ignition risk from missing seals and shifting inspection, repair and downtime costs onto aircraft operators while regulators enforce compliance."},"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":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating repairs to prevent strut fires."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement: comply with external FAA directive","No defined terms section — relies entirely on external Boeing and FAA documents","Simple conditional applicability (specific aircraft models and engine types)","No nested exceptions or complex procedural logic","Single compliance deadline referenced externally"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. It requires owners and operators of specific Boeing 767 aircraft to fix a dangerous design flaw.\n\n**What the problem is:**\nThe vapour barrier seal in the wing struts (structural supports connecting the wing to the fuselage) can go missing or fail. This seal normally prevents flammable fluids from leaking onto hot engine exhaust parts when the plane is on the ground. Without it, fuel or other fluids could drip onto hot metal, ignite, and cause an uncontained fire.\n\n**Who must act:**\n- Owners and operators of Boeing 767-200, -300, and -300F series aircraft\n- Only those with General Electric or Pratt & Whitney engines\n- Specifically, aircraft covered by Boeing Service Bulletin 767-54-0107 Revision 1\n\n**What they must do:**\nFollow the technical instructions in the referenced US Federal Aviation Administration (FAA) directive (AD 2005-06-10). This typically involves inspecting the strut vapour barrier seals and repairing or replacing them as needed.\n\n**Why it matters:**\nThis is a fire prevention measure. The missing seal was discovered during aircraft production, meaning some planes in service might have the same defect. The directive prevents a potential ground fire hazard that could destroy the aircraft and endanger lives."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-209-strut-vapour-barrier-seal","history":"/api/acts/ad-b767-209-strut-vapour-barrier-seal/history","analysis":"/api/acts/ad-b767-209-strut-vapour-barrier-seal/analysis","conflicts":"/api/acts/ad-b767-209-strut-vapour-barrier-seal/conflicts","importantCases":"/api/acts/ad-b767-209-strut-vapour-barrier-seal/important-cases","documents":"/api/acts/ad-b767-209-strut-vapour-barrier-seal/documents"}}