{"id":"F2006B11422","name":"AD/OXY/11 - Scott Aviation Oxygen Mask Plug-In Connectors PN 289-57","slug":"ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57341,"registerId":"commonwealth-F2006B11422-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/OXY/11 - Scott Aviation Oxygen Mask Plug-In Connectors PN 289-57","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nOxygen Systems\n\nAD/OXY/11 Scott Aviation Oxygen Mask Plug-In\n\nConnectors PN 289-57\n\n  \n12/92\n\nApplicability: Scott Aviation (Sierra Madre CA USA) Oxygen Plug-In Connector, Part Number 289-57, as installed in, but not limited to Boeing Model 727, 737, 747, 757 and 767 series aircraft; McDonnell Douglas DC-9-80 series aircraft and Fokker F-28 series aircraft.\n\nNote: The constant flow oxygen masks to which the connectors might be fitted include, but are not necessarily limited to, the following Scott Part Numbers:\n\n289-127-5, 289-601-34, 289-601-35 and 289-601-234.\n\nRequirement: Action in accordance with the requirements of Scott Aviation Service Bulletin 289- 35-15 Revision 1 dated 12 June 1992.\n\nNote: FAA AD 92-16-15 Amdt 39-8324 dated 1 September 1992 refers.\n\nCompliance: Within 60 days from 12 November 1992.\n\nBackground: The FAA has received reports that some plug-in connectors do not fully enter the fitting on portable emergency oxygen bottles, preventing the flow of emergency oxygen through face masks. Compliance with this Directive prevents a lack of oxygen flow from portable emergency oxygen bottles due to discrepant oxygen mask plug-in connectors.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive targets Scott Aviation connector PN 289-57 as installed on the listed aircraft and requires action per the manufacturer's service bulletin to address reported seating failures. The scope in this instrument mirrors the stated safety problem and references the related FAA AD without expanding the affected parts or aircraft beyond those listed (Applicability; Background; Note)."},"complexity_factors":["Narrow, technical safety issue but safety-critical: connectors may prevent oxygen flow if they do not fully seat (Background).","Remedial action delegated to an external document — Scott Aviation Service Bulletin 289-35-15 Rev 1 — requiring operators to follow another technical instrument (Requirement).","Short, fixed compliance timeframe of 60 days creates operational scheduling and resource pressures for operators (Compliance).","Applicability spans multiple aircraft models and several Scott mask part numbers, increasing the inspection population and record-keeping burden (Applicability).","Enforcement is mandatory under the AD with limited administrative discretion; costs (inspection, replacement, labour) fall to operators (Requirement; Compliance).","Cross-reference to FAA AD introduces an external regulatory linkage but no additional procedural detail in this text (Note)."],"plain_english_summary":"This airworthiness directive requires operators to inspect and, where necessary, repair Scott Aviation oxygen mask plug-in connectors PN 289-57 on the listed aircraft, following Scott Aviation Service Bulletin 289-35-15 Revision 1. (Requirement; Applicability.)\n\nOperators must comply within 60 days and will bear inspection and repair costs; CASA enforces the directive to prevent portable emergency oxygen bottles failing to deliver oxygen due to improperly seated connectors. (Compliance; Background.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive addressing a specific safety defect in a specific aircraft component. It has not expanded beyond its original purpose of mandating corrective action for faulty oxygen mask connectors."},"complexity_factors":["Single, specific technical requirement referencing an external service bulletin","Limited applicability to one part number across defined aircraft types","Simple compliance deadline (60 days from specified date)","No nested exceptions, conditional logic, or alternative compliance methods","Minimal defined terms (only standard aviation terminology: PN, AD, FAA)","No cross-referencing to other legislation beyond noting related FAA directive"],"plain_english_summary":"This safety order requires operators of certain Boeing (727, 737, 747, 757, 767), McDonnell Douglas DC-9-80, and Fokker F-28 aircraft to inspect and repair Scott Aviation oxygen mask connectors (P/N 289-57) that may not properly mate with portable oxygen bottles. Work must follow Scott Aviation Service Bulletin 289-35-15 (Rev 1, 12 June 1992) and be completed within 60 days of 12 November 1992 to ensure emergency oxygen availability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57","history":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57/history","analysis":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57/analysis","conflicts":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57/conflicts","importantCases":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57/important-cases","documents":"/api/acts/ad-oxy-11-scott-aviation-oxygen-mask-plug-in-connectors-pn-289-57/documents"}}