{"id":"F2006B03180","name":"AD/B747/286 - Oxygen Masks","slug":"ad-b747-286-oxygen-masks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42552,"registerId":"commonwealth-F2006B03180-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)![](image.001.png)AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nBoeing 747 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B747/286 Oxygen Masks 3/2003","sectionType":"part","heading":"AD/B747/286 Oxygen Masks 3/2003","content":"# AD/B747/286 Oxygen Masks 3/2003\n\nApplicability: Model 747-100, 100B, 100B SUD, \\-200B, \\-200C, 200F, \\-300, 747SR and 747SP\n\nseries aeroplanes.\n\nRequirement: Revise the procedures regarding donning oxygen masks in the event of rapid depressurisation, as contained in the Emergency Procedures section of the Aircraft Flight Manual (AFM), as follows:\n\nDelete: \\-\n\n''RAPID DEPRESSURISATION (With aeroplane altitude above 14,000 feet MSL.)\n\nRECALL\n\nOxygen Masks & Regulators—ON, 100%'' Insert: -\n\n\"CABIN ALTITUDE WARNING OR RAPID DEPRESSURISATION\n\nIf the cabin altitude warning horn sounds:\n\nRECALL\n\nOxygen Masks & Regulators—ON, 100%\"\n\nThe rest of the steps under this heading in the AFM are unchanged.\n\nThe AFM revision may be accomplished by inserting a copy of the Directive into the relevant section of the AFM.\n\nNote: FAA AD 2003-03-15 Amdt 39-13039 refers.\n\nCompliance: Before 20 June 2003.\n\nThis Airworthiness Directive becomes effective on 20 March 2003.","sortOrder":1}],"analysis":{"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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive stays within the original, stated scope: it mandates a specific AFM wording change for the listed Boeing 747 models and sets a compliance date. It does not expand to require physical modifications or additional maintenance beyond inserting the Directive into the AFM (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow, single-text change to an AFM emergency procedure (Requirement).","Limited aircraft applicability to specified 747 variants (Applicability).","Clear compliance deadline and effective date, creating concrete timing obligations (Compliance; effective date).","Low implementation complexity: revision may be made by inserting the Directive into the AFM (Requirement).","Safety-critical operational impact despite simple textual change — immediate crew action required on cabin altitude warning (Requirement).","Cross-reference to related FAA AD for context (Note).","Regulatory origin and authority stated under CAR 1998 subregulation 39.1(1), giving the CASA delegate power to require corrective action (preamble)."],"plain_english_summary":"This directive changes the Aircraft Flight Manual emergency procedure for certain Boeing 747 models so that when the cabin altitude warning horn sounds crew must set oxygen masks and regulators to ON, 100% — replacing a step previously limited to rapid depressurisation above 14,000 ft. It applies to the listed 747 series; operators must insert the Directive into the AFM and comply by 20 June 2003. Operators bear the task (and any minor administrative or training cost) of updating the AFM and ensuring crew follow the revised procedure."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope — a targeted safety fix for specific Boeing 747 models. It has not expanded beyond its initial purpose of correcting an unsafe condition related to oxygen mask deployment procedures."},"complexity_factors":["Single, specific mechanical action required (text replacement in a manual)","Only one defined term of note ('MSL' — Mean Sea Level, though not explicitly defined here)","No nested exceptions or conditional logic beyond the basic applicability criteria","Clear, linear structure: Applicability → Requirement → Compliance","Minimal cross-referencing (only a note about related FAA directive)","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of specific Boeing 747 series to revise their Aircraft Flight Manuals so pilots don oxygen masks immediately when the cabin altitude warning horn sounds, instead of waiting for confirmed rapid depressurisation above 14,000 ft. \n\nThe change closes a safety gap so pilots receive oxygen sooner during emergencies, reducing the risk of hypoxia and loss of crew effectiveness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-286-oxygen-masks","history":"/api/acts/ad-b747-286-oxygen-masks/history","analysis":"/api/acts/ad-b747-286-oxygen-masks/analysis","conflicts":"/api/acts/ad-b747-286-oxygen-masks/conflicts","importantCases":"/api/acts/ad-b747-286-oxygen-masks/important-cases","documents":"/api/acts/ad-b747-286-oxygen-masks/documents"}}