{"id":"F2006B03272","name":"AD/B747/94 - Fire Extinguishing System","slug":"ad-b747-94-fire-extinguishing-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42696,"registerId":"commonwealth-F2006B03272-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/94 - Fire Extinguishing System","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/B747/94 Fire Extinguishing System 6/91\n\nApplicability: As detailed in the Requirement Document.\n\n \n\nRequirement: Action in accordance with the technical requirements of FAA AD 91-05-04. Compliance:              As specified in the Requirement Document.\n\nBackground: This AD requires modification of the fire extinguishing system in order to preclude the possibility of improper connection of the system wiring during maintenance.\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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific technical safety modification. It has not expanded beyond its original purpose of addressing the wiring connection risk in Boeing 747 fire extinguishing systems."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section — relies entirely on external reference to FAA AD 91-05-04","Single, straightforward requirement: modify fire extinguishing system wiring","No conditional logic, exceptions, or nested provisions","Minimal cross-referencing (only to external FAA document and generic 'Requirement Document')","No penalty provisions, enforcement mechanisms, or dispute resolution clauses included in this excerpt"],"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 aircraft.\n\n**What it does:** It requires owners and operators of Boeing 747 aircraft to modify the fire extinguishing system. Specifically, the modification prevents maintenance crews from accidentally connecting the system's wiring incorrectly during repairs or servicing.\n\n**Who it affects:** Anyone who owns, operates, or maintains Boeing 747 series aircraft in Australia.\n\n**Why it matters:** Fire extinguishing systems are critical safety equipment. If the wiring is connected improperly, the system might fail to activate during an actual fire emergency — putting passengers, crew, and the aircraft at serious risk. This directive closes that safety gap by mandating a specific technical fix developed by the US Federal Aviation Administration (FAA AD 91-05-04).\n\n**How to comply:** Aircraft operators must follow the technical requirements and compliance timeline set out in the referenced \"Requirement Document\" (the original FAA directive)."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD, as written, sets a narrowly defined scope: require modification of Boeing 747 series aeroplane fire extinguishing systems to prevent improper wiring connections during maintenance, implemented by following FAA AD 91-05-04 and compliance rules in the Requirement Document. The text provides no indication that the scope has been broadened or narrowed from that stated objective; therefore there is no evidence in the source text that the scope has changed from its original stated intent. (Requirement; Background; Applicability)"},"complexity_factors":["Delegation of technical detail to an external FAA AD (FAA AD 91-05-04) rather than including technical steps in the AD text (Requirement).","Applicability and compliance timing are defined in a separate Requirement Document, requiring users to locate and read multiple documents (Applicability; Compliance).","Short AD text provides the mandate but no in-text procedural detail, increasing operational uncertainty for implementers (Requirement; Background).","Dependence on a foreign authority’s technical specification creates a need to reconcile domestic regulatory enforcement with imported technical methods (Requirement).","Potential ambiguity about which specific 747 models or serials are covered without consulting the Requirement Document (Applicability)."],"plain_english_summary":"The AD requires Boeing 747 series aeroplanes to have their fire‑extinguishing system modified, directing operators to follow FAA AD 91‑05‑04 and a separate Requirement Document for technical steps, timing and applicability. CASA issues and enforces the AD; owners/operators must fund and arrange the work. It matters because the change prevents incorrect wiring connections, but compliance depends on obtaining and following the referenced external documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-94-fire-extinguishing-system","history":"/api/acts/ad-b747-94-fire-extinguishing-system/history","analysis":"/api/acts/ad-b747-94-fire-extinguishing-system/analysis","conflicts":"/api/acts/ad-b747-94-fire-extinguishing-system/conflicts","importantCases":"/api/acts/ad-b747-94-fire-extinguishing-system/important-cases","documents":"/api/acts/ad-b747-94-fire-extinguishing-system/documents"}}