{"id":"F2006B03419","name":"AD/B767/65 - Bulk Cargo Ventilation Valve","slug":"ad-b767-65-bulk-cargo-ventilation-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42960,"registerId":"commonwealth-F2006B03419-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/65 - Bulk Cargo Ventilation Valve","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 767 Series Aeroplanes\n\n \n\nAD/B767/65 Bulk Cargo Ventilation Valve 5/92\n\nApplicability: Model 767 Series as listed in the Requirement Document.\n\n \n\nRequirement: Remove the bulk cargo ventilation flapper valve in accordance with Boeing Alert SB 767-21A0098.\n\n \n\nNote: FAA AD 92-02-12 Amdt 39-8148 refers.\n\n \n\nCompliance: Within 4000 Hours Time in Service after 2 March 1992.\n\n \n\nBackground: The FAA has received a report of a cargo compartment flapper valve that did not close during a functional check of the bulk cargo compartment fire extinguishing system. This condition could result in loss of the extinguishing agent through an open flapper valve.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive. It addresses one specific mechanical defect on one aircraft type with one mandated action. There is no indication of scope creep; the document precisely matches its original purpose of addressing the identified fire suppression vulnerability."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 substantive requirement (remove the valve)","Single applicability criterion (Model 767 Series per referenced document)","No defined terms section","No cross-references to other legislation (only references to Boeing technical document and FAA AD)","Simple compliance deadline (hours in service, not conditional)","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific Boeing 767 aircraft.\n\n**What it requires:** Airlines and aircraft operators must **remove a specific ventilation valve** from the bulk cargo hold (the large cargo area behind the passenger cabin) on affected Boeing 767 planes. The valve is a \"flapper valve\" — a simple one-way flap that normally lets air move but should seal shut during a fire.\n\n**Why it matters:** The US Federal Aviation Administration (FAA) discovered that this valve could fail to close properly. If a fire broke out in the cargo hold and the valve stayed open, fire-extinguishing gas would leak out instead of smothering the flames. This creates a serious safety risk — a fire could spread unchecked.\n\n**Who must comply:** Operators of Boeing 767 series aircraft covered by Boeing Alert Service Bulletin 767-21A0098.\n\n**When:** The removal had to be completed within 4,000 flight hours after 2 March 1992.\n\n**Key point:** This is a **retrospective safety fix** — it doesn't change how future planes are built, but mandates a specific repair on existing aircraft already in service."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope, as stated in the text provided, is limited to Model 767 Series aeroplanes listed in the Requirement Document and requires removal of the bulk cargo ventilation flapper valve within a specified time window to address the reported valve malfunction (Applicability; Requirement; Compliance; Background). The document does not indicate any expansion or narrowing of scope from the stated intent to mitigate loss of extinguishing agent due to a valve that may not close."},"complexity_factors":["Single mandated maintenance action (remove valve) — low procedural complexity but technical execution required (Requirement).","Cross-reference to an external service bulletin for the detailed procedure — requires access to and reliance on Boeing Alert SB 767-21A0098 (Requirement).","Compliance tied to flight hours from a fixed date (4,000 hours after 2 March 1992) — requires accurate time-in-service tracking (Compliance).","Applicability depends on which aircraft are listed in a separate Requirement Document — determining scope requires consulting that document (Applicability).","Regulatory cross-reference to FAA AD (Note) — indicates alignment with another regulator but adds an extra document to consider."],"plain_english_summary":"Requires removal of the bulk-cargo ventilation flapper valve from specified Boeing 767s per Boeing Alert Service Bulletin 767-21A0098, to be completed within 4,000 flight hours after 2 March 1992. Operators/maintainers must perform and document the work and bear associated costs; CASA enforces compliance. The measure responds to a reported flapper-valve failure that could allow loss of fire‑extinguishing agent and aligns with FAA AD 92-02-12."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve","history":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve/history","analysis":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve/analysis","conflicts":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve/conflicts","importantCases":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve/important-cases","documents":"/api/acts/ad-b767-65-bulk-cargo-ventilation-valve/documents"}}