{"id":"F2006B03263","name":"AD/B747/86 - Cargo Compartment Liner Panels","slug":"ad-b747-86-cargo-compartment-liner-panels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42687,"registerId":"commonwealth-F2006B03263-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/86 - Cargo Compartment Liner Panels","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/B747/86 Cargo Compartment Liner Panels 3/91\n\nApplicability: Model 747 series; equipped with class “C” lower lobe cargo compartments that do not have complete cargo compartment floors.\n\n \n\nRequirement: Action in accordance with the technical requirements of FAA AD 90-25-08 Amdt 39- 6816.\n\n \n\nCompliance: As specified in the Requirement Document.\n\n \n\nBackground: An FAA investigation into the service history of cargo compartment fires and full- scale fire testing, revealed that, without additional cargo liner panels, fire could migrate up behind the cargo liner and cause major structural damage.\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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific fire risk in specific aircraft configurations. It has not expanded beyond its original purpose of mandating cargo liner panel installation."},"complexity_factors":["Very short document (under 200 words)","Only 4 operative sections: Applicability, Requirement, Compliance, and Background","Single cross-reference to external FAA document (AD 90-25-08) for technical details","No defined terms section — relies on standard aviation terminology","No conditional logic or nested exceptions","Straightforward applicability criteria (specific aircraft model + specific configuration)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt requires owners and operators of certain Boeing 747 aircraft to install additional cargo liner panels in the lower cargo compartments.\n\n**Who it affects:**\n- Boeing 747 series aircraft\n- Specifically those with \"Class C\" lower cargo compartments that **don't** have complete cargo compartment floors\n\n**Why it matters:**\nThe FAA (American aviation regulator) discovered through fire testing that without these extra liner panels, fire could spread upward behind the cargo lining and cause serious structural damage to the aircraft. This directive prevents that safety risk by mandating a fix.\n\n**What must be done:**\nOperators must follow the technical requirements set out in the American FAA directive AD 90-25-08 (as amended). The exact timeline for compliance is set out in that same document."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive does not expand or narrow the class of regulated activities beyond issuing a mandated retrofit for a specific aircraft type and configuration. It requires operators to follow the FAA technical requirements for installation and to comply as set out in the Requirement Document, without altering the broader regulatory scope of airworthiness directives under Part 39."},"complexity_factors":["Reference to an external technical document (FAA AD 90-25-08) for the substantive technical requirements, requiring operators to obtain and follow another instrument (Requirement).","Applicability limited to a specific aircraft model and a particular cargo compartment configuration, requiring individual assessment of whether an aircraft falls within scope (Applicability).","Compliance specifics are not reproduced in this text but are contained in a Requirement Document, creating a dependence on additional paperwork for actionable steps (Compliance).","Implementation requires physical modification work (retrofit installation), implying coordination between operators and approved maintenance organisations, parts procurement and aircraft downtime.","Safety rationale rests on referenced investigations and tests rather than operational metrics in the directive, so cost–benefit quantification is not present in the AD text (Background)."],"plain_english_summary":"This AD requires operators of certain Boeing 747s with class “C” lower-lobe cargo compartments and incomplete floors to install additional lower-lobe cargo liner panels, following the steps in FAA AD 90-25-08. It was issued after tests showed fire can migrate behind liners and risk structural damage. Affected operators must fund and schedule the retrofit, imposing downtime and maintenance costs while reducing fire risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-86-cargo-compartment-liner-panels","history":"/api/acts/ad-b747-86-cargo-compartment-liner-panels/history","analysis":"/api/acts/ad-b747-86-cargo-compartment-liner-panels/analysis","conflicts":"/api/acts/ad-b747-86-cargo-compartment-liner-panels/conflicts","importantCases":"/api/acts/ad-b747-86-cargo-compartment-liner-panels/important-cases","documents":"/api/acts/ad-b747-86-cargo-compartment-liner-panels/documents"}}