{"id":"F2006B11427","name":"AD/OXY/16 - Puritan-Bennett Oxygen Mask","slug":"ad-oxy-16-puritan-bennett-oxygen-mask","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57351,"registerId":"commonwealth-F2006B11427-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/OXY/16 - Puritan-Bennett Oxygen Mask","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/16 Puritan-Bennett Oxygen Mask 11/97\n\nApplicability: Puritan-Bennett sweep-on crew oxygen masks with the following part numbers:\n\n| 114321-01 | 114321-15 | 114321-16 | 114322-01 |\n| --------- | --------- | --------- | --------- |\n| 114322-02 | 114322-03 | 114322-05 | 114323-01 |\n| 114622-01 | 114622-02 | 114623-01 | 114623-02 |\n\nThese items may have Puritan-Bennett cone and seal assemblies, part numbers 210543 and 210543-01 manufactured or repaired from 1 August 1996 to 31 July 1997 inclusive, fitted.\n\nNote: This equipment may be fitted to any aircraft.\n\nRequirement: 1. Replace any cone and seal assembly referenced in this airworthiness directive (AD) with an approved assembly not covered by this AD.\n\n2. As of the effective date of this AD no aircraft may be equipped with any Puritan- Bennett oxygen mask that has the cone and seal assembly, part numbers 210543 and 210543-01, manufactured or repaired between 1 August 1996 and 31 July 1997 inclusive, fitted.\n\nNote: 1. FAA AD 97-18-03 Amdt 39-10113 refers.\n\nNote: 2. Puritan-Bennett Service Bulletin 3500-97-14, dated 7 August 1997, specifies identification and replacement of the part numbers 210543 and 210543-01.\n\nCompliance: Within 7 days after effective date of this directive.\n\nThis airworthiness directive becomes effective on 9 October 1997.\n\nBackground: FAA has advised that there may be a risk of failure of the ultrasonic weld on the cone and seal assembly of the oxygen mask with consequent reduced oxygen flow through the mask, which could result in the crew not being able to obtain oxygen in an emergency situation. This AD is intended to prevent that occurrence.","sortOrder":0}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in a specific component. The scope remains precisely limited to the identified faulty parts and has not expanded beyond the original safety purpose."},"complexity_factors":["Single, specific technical subject matter (one manufacturer's oxygen mask component)","Clear applicability table with 12 specific part numbers","Simple two-part requirement: replace part, then prohibit installation","Single compliance deadline (7 days) with no conditional exceptions","No defined terms section or interpretive provisions","Minimal cross-referencing (only two notes referencing FAA directive and manufacturer bulletin)","No nested conditions or layered exceptions"],"plain_english_summary":"This Airworthiness Directive orders immediate replacement of certain Puritan‑Bennett crew oxygen masks whose cone-and-seal assemblies, manufactured or repaired Aug 1996–Jul 1997, may have faulty welds that can prevent oxygen flow. Operators (airlines, charters, private owners) must fit approved replacement parts within 7 days of the directive’s effective date (9 Oct 1997); aircraft may not fly with the suspect assemblies installed. The fix prevents possible crew incapacitation during high‑altitude decompression."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope matches its stated safety objective: it targets specific part numbers and a defined manufacture/repair date range to mitigate a weld‑failure risk. It does not expand beyond requiring replacement and banning the affected parts; the measures are confined to the listed assemblies and the stated compliance timeframe (Requirements 1–2; Compliance; Background)."},"complexity_factors":["Narrow, part‑numbered applicability requiring operators to check specific mask PNs and the cone/seal manufacture/repair dates — (Applicability).","Short mandatory compliance window (7 days from effective date) increases logistical pressure on operators to source replacements quickly — (Compliance).","Requirement to fit an 'approved assembly' may require parts sourcing or approval processes beyond simple purchase — (Requirement 1).","Absolute prohibition on carriage of affected parts from the effective date creates an immediate operational constraint until replacement is complete — (Requirement 2).","Identification and replacement guidance is referenced to a manufacturer service bulletin, placing technical identification burden on operators/maintenance organisations — (Note 2: Service Bulletin 3500-97-14).","Applies to masks ‘that may be fitted to any aircraft’, widening the pool of potentially affected operators despite narrow part/date criteria — (Applicability: Note).","Safety justification and defect mechanism are specified (risk of ultrasonic weld failure reducing oxygen flow), leaving little regulatory discretion on the need for action — (Background)."],"plain_english_summary":"This directive requires aircraft operators to replace specific Puritan‑Bennett oxygen mask cone and seal assemblies (parts 210543 and 210543‑01) if they were made or repaired between 1 Aug 1996 and 31 Jul 1997. Affected masks (listed part numbers) must be removed from service and fitted with an approved replacement within 7 days of the effective date to prevent possible ultrasonic weld failure that could reduce oxygen flow in an emergency. Operators bear the cost and responsibility for identification and replacement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask","history":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask/history","analysis":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask/analysis","conflicts":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask/conflicts","importantCases":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask/important-cases","documents":"/api/acts/ad-oxy-16-puritan-bennett-oxygen-mask/documents"}}