{"id":"F2006B11436","name":"AD/OXY/9 - Du Pont Pels Crewmember Protective Breathing Equipment","slug":"ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57369,"registerId":"commonwealth-F2006B11436-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/OXY/9 - Du Pont Pels Crewmember Protective Breathing Equipment","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/9 Du Pont Pels Crewmember Protective\n\nBreathing Equipment\n\n  \n7/92\n\nApplicability: E.I. Du Pont de Nemours & Co PELS Crewmember Protective Breathing Equipment (PBE) Model 4566M37B-042N with serial numbers below V9100000.\n\nRequirement: Action in accordance with the Procedure Instructions in E.I. Du Pont de Nemours PELS PBE Service Bulletin No 002 dated 5 February 1991.\n\nNote: FAA AD 91-15-15 Amendment 39-7079 refers.\n\nCompliance: Prior to 10 August 1992.\n\nBackground: The issue of this Directive is prompted by reports received by the FAA indicating that the Velcro strips affixed to the PBE barrier pouch become excessively attached to the Nomex felt liner bracket rendering the pouch difficult to remove from the bracket.\n\nThis condition, if not corrected, could result in the failure of a crewmember to remove the pouch from the bracket in case of fire.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive targeting one specific product defect. It has not expanded beyond its original purpose of addressing the Velcro adhesion problem in this particular breathing equipment model."},"complexity_factors":["Single, specific equipment model targeted (narrow applicability)","Only one compliance action required (follow the service bulletin)","No defined terms section — uses plain equipment descriptions","No cross-references to other legislation beyond a single FAA reference note","Single deadline with no conditional extensions or exceptions","Background explanation included in plain language"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners or operators to fix a specific safety problem.\n\n**What it does:**\nOrders owners of certain crew breathing equipment to follow specific repair instructions by a deadline.\n\n**Who it affects:**\nAnyone operating aircraft with **Du Pont PELS Crewmember Protective Breathing Equipment (PBE)** — specifically Model 4566M37B-042N with serial numbers below V9100000. This is emergency breathing gear that flight crew wear if there's smoke or fire on board.\n\n**The safety problem:**\nThe Velcro strips on the equipment's storage pouch are sticking too strongly to the bracket that holds it. In an emergency, a crew member might struggle to grab the breathing mask quickly — which could be deadly in a fire.\n\n**What must be done:**\nFollow the repair steps in **Du Pont Service Bulletin No. 002** (dated 5 February 1991) before **10 August 1992**.\n\n**Why it matters:**\nThis is about **seconds in an emergency**. If a pilot or crew member can't get their smoke mask on immediately because the pouch is stuck, they could be overcome by smoke or unable to fight a fire. The directive forces a fix before the problem causes an accident."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive applies to the specified Du Pont PELS PBE model and serial-number range and requires the corrective procedure in the manufacturer’s Service Bulletin to be completed before the stated date. The instrument’s scope as described (Applicability; Requirement; Compliance) aligns with the stated purpose in the Background; there is no indication in the text that the scope was expanded or narrowed from that stated purpose."},"complexity_factors":["Narrow technical scope limited to a single PBE model and serial number range (Applicability)","Single corrective action mandated by reference to a manufacturer Service Bulletin, rather than multiple regulatory steps (Requirement)","Fixed compliance deadline imposing scheduling constraints (Compliance)","Dependence on an external document (Service Bulletin) for the exact procedure increases procedural dependency and may create access or interpretation issues (Requirement)","Reference to a foreign regulator's AD (FAA AD 91-15-15) introduces cross-jurisdictional linkage though not additional procedural steps (Note)"],"plain_english_summary":"This Directive mandates that owners/operators of Du Pont PELS PBE Model 4566M37B-042N with serial numbers below V9100000 follow Du Pont Service Bulletin No. 002 (5 Feb 1991) to correct Velcro adhesion that can prevent pouch removal, completing the work before 10 August 1992.  \n\nIt is binding on operators/maintenance organisations (who bear compliance costs and downtime), was issued by the Civil Aviation Safety Authority, and notes related FAA AD 91-15-15."}},"importantCases":[],"_links":{"self":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment","history":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment/history","analysis":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment/analysis","conflicts":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment/conflicts","importantCases":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment/important-cases","documents":"/api/acts/ad-oxy-9-du-pont-pels-crewmember-protective-breathing-equipment/documents"}}