{"id":"F2006B03031","name":"AD/B747/13 - Cargo Compartment Lining Depressurisation Vent Panel - Inspection and Rework","slug":"ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42390,"registerId":"commonwealth-F2006B03031-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/13 - Cargo Compartment Lining Depressurisation Vent Panel - Inspection and Rework","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 747 Series Aeroplanes\n\n \n\nAD/B747/13 Cargo Compartment Lining Depressurisation\n\nVent Panel - Inspection and Rework\n\nApplicability: All models listed in Boeing SB No. 747-25-2306. Document:  1. FAA AD 78-07-09, Amdt. 39-3177; or\n\n2. Boeing SB No. 747-25-2418.\n\n \n\nCompliance: As per requirement document No. 1.\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\n \n\n \n\n \n\n \n\n\n5/78\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provided does not indicate any change in scope from an earlier or original instrument. It states applicability (models listed in Boeing SB No. 747-25-2306) and requires compliance with a named requirement document (Document; Compliance). No material in this AD text shows an expansion or contraction of scope relative to prior measures; any comparison would require earlier instruments not included in the supplied text."},"complexity_factors":["Relies primarily on external documents (FAA AD 78-07-09 or Boeing SB 747-25-2418) for procedural detail, so the directive text itself is short but requires consultation of other materials.","Applicability is narrowly defined (models listed in Boeing SB 747-25-2306), reducing scope ambiguity but requiring access to that SB to identify affected aircraft.","The AD text does not allocate costs, performance responsibility, or provide alternative compliance paths, creating potential operational or contractual questions for implementers.","Potential for implementation uncertainty if referenced documents are unavailable, superseded, or interpreted differently across jurisdictions.","Low internal complexity (few clauses) but moderate external complexity because mandated action depends on interpreting and applying the referenced requirement document(s)."],"plain_english_summary":"This AD requires operators of the Boeing 747s listed in Boeing SB 747-25-2306 to inspect and rework the cargo-compartment lining depressurisation vent panel, by complying with the procedures in the referenced FAA AD 78-07-09 or Boeing SB 747-25-2418. It matters because it addresses the vent-panel condition but delegates procedural detail to external documents, creating administrative steps, potential downtime and costs, and reliance on those referenced documents for compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive implementing a specific safety requirement for a particular aircraft type. It has not expanded beyond its original purpose of mandating inspection and rework of cargo compartment vent panels on Boeing 747 aircraft."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies entirely on external documents (FAA AD and Boeing Service Bulletin)","Single, straightforward compliance requirement: 'As per requirement document No. 1'","No conditional logic, exceptions, or nested provisions","Simple applicability clause referencing a single Boeing service bulletin","Essentially a pointer to external technical documentation rather than self-contained regulatory text"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of **Boeing 747 aircraft** to inspect and repair a specific part of the cargo hold.\n\n**What it covers:**\n- The **depressurisation vent panels** in the cargo compartment lining — these are panels that allow air pressure to equalise safely during flight\n- All Boeing 747 models listed in Boeing Service Bulletin 747-25-2306\n\n**What must be done:**\n- Operators must follow the inspection and rework procedures set out in **FAA Airworthiness Directive 78-07-09** (the original US safety order) or **Boeing Service Bulletin 747-25-2418**\n- The work must be completed according to the timeline and methods specified in that FAA document\n\n**Why it matters:**\nFaulty cargo compartment vent panels could fail during depressurisation, potentially damaging the aircraft structure or creating a safety hazard in the cargo hold. This AD ensures all Australian-registered Boeing 747s meet the same safety standard as US-registered aircraft.\n\n**Who it affects:**\n- Airlines and operators flying Boeing 747s in Australia\n- Maintenance organisations servicing these aircraft\n- The aircraft must remain compliant to stay legally airworthy"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework","history":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework/history","analysis":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework/analysis","conflicts":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework/conflicts","importantCases":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework/important-cases","documents":"/api/acts/ad-b747-13-cargo-compartment-lining-depressurisation-vent-panel-inspection-and-rework/documents"}}