{"id":"F2010L00861","name":"AD/HS 125/185 - High Pressure Oxygen Hoses - Inspection","slug":"ad-hs-125-185-high-pressure-oxygen-hoses-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82761,"registerId":"commonwealth-F2010L00861-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 125 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 125 Series Aeroplanes","content":"### British Aerospace BAe 125 Series Aeroplanes\n\n| AD/HS 125/185 | High Pressure Oxygen Hoses - Inspection | 8/2010 |\n| ------------- | --------------------------------------- | ------ |\n\n| Applicability: | As specified in FAA AD 97-21-05 Amendment 39-10158.                                                                                                                                                                                                                                                                                                                   |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with FAA AD 97-21-05 Amendment 39-10158.Note: Raytheon Service Bulletin (SB) 35-46 also refers.                                                                                                                                                                                                                                                  |\n| Compliance:    | Prior to further flight.                                                                                                                                                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 22 April 2010.                                                                                                                                                                                                                                                                                                      |\n| Background:    | This AD requires replacement of all high-pressure oxygen hoses having part number WKA 34609 to prevent leaks in hose assemblies which could result in insufficient oxygen being made available to passengers or crew. The Requirement document also specifies that no person shall install a high-pressure oxygen hose having part number WKA 34609 on any aeroplane. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n7 April 2010","sortOrder":0},{"sectionNumber":"AD/HS 125/185","sectionType":"part","heading":"AD/HS 125/185","content":"## AD/HS 125/185","sortOrder":1},{"sectionNumber":"High Pressure Oxygen Hoses - Inspection","sectionType":"part","heading":"High Pressure Oxygen Hoses - Inspection","content":"## High Pressure Oxygen Hoses - Inspection","sortOrder":2},{"sectionNumber":"8/2010","sectionType":"part","heading":"8/2010","content":"## 8/2010","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety-critical defect in a specific aircraft type. The scope remains precisely limited to the identified oxygen hose defect and has not expanded beyond this original safety purpose."},"complexity_factors":["Very short document — approximately 150 words of substantive content","Only one defined term implicitly referenced (the part number WKA 34609)","Single, unambiguous compliance requirement with no conditional exceptions","No nested cross-references beyond a single reference to the FAA AD and a service bulletin","Clear, immediate compliance deadline with no alternative methods or phased implementation"],"plain_english_summary":"Airworthiness Directive for British Aerospace BAe 125 series: immediately replace all high‑pressure oxygen hoses P/N WKA 34609 and prohibit their installation. It applies to operators and maintenance organisations and requires grounding \"prior to further flight\" until corrected.\n\nThese hoses may leak, risking loss of emergency oxygen for crew and passengers. Effective 22 April 2010; the AD references FAA AD 97‑21‑05, reflecting international safety alignment."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change: the AD adopts the FAA AD 97‑21‑05 applicability and requires replacement and a prohibition on installation of part WKA 34609 as stated (Applicability; Requirement). The text provided does not expand or narrow the FAA‑specified scope."},"complexity_factors":["Direct technical requirement limited to a single part number (WKA 34609) — lowers substantive complexity (Background; Requirement).","Cross‑reference to an external FAA airworthiness directive for full applicability creates interpretive dependence on another instrument (Applicability).","Reference to a manufacturer service bulletin (Raytheon SB 35‑46) for procedures adds an implementation source but does not itself change the mandate (Requirement).","Immediate compliance timeframe (“prior to further flight”) can cause operational disruption and logistical scheduling pressure for operators (Compliance).","Prohibition on reinstalling the part imposes an ongoing operational constraint beyond one‑off replacement (Background).","No detailed inspection or conditional evaluation criteria in this text — the directive relies on the referenced documents for procedural specifics (Requirement; Applicability)."],"plain_english_summary":"This directive requires operators of British Aerospace BAe 125 series aeroplanes to replace all high‑pressure oxygen hoses bearing part number WKA 34609 and forbids installing that part (Requirement; Background). Compliance must be completed before the aircraft’s next flight and follows the applicability set out in FAA AD 97‑21‑05; Raytheon Service Bulletin 35‑46 is also referenced (Compliance; Applicability). Operators (owners/maintainers) bear replacement costs and must follow the referenced documents for procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection","history":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection/history","analysis":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection/analysis","conflicts":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection/conflicts","importantCases":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection/important-cases","documents":"/api/acts/ad-hs-125-185-high-pressure-oxygen-hoses-inspection/documents"}}