{"id":"F2006B11429","name":"AD/OXY/19 - Puritan-Bennett Oxygen Masks","slug":"ad-oxy-19-puritan-bennett-oxygen-masks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57355,"registerId":"commonwealth-F2006B11429-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/OXY/19 - Puritan-Bennett Oxygen Masks","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/19 Puritan-Bennett Oxygen Masks 6/99\n\nApplicability: Puritan-Bennett Aero Systems C351-2000 series passenger oxygen masks and portable oxygen masks, with the following part numbers, that have elastomer cure dates between September 1993 and March 1997:\n\n```html\n

Passenger Masks

C351-2000-00

174006-31

174504-01 (C351-2000-205)

C351-2000-02

174290-21

174505-01 (C351-2000-201)

C351-2000-21

174290-22

174506-00 (C351-2000-223)

C351-2000-38

174290-24

174509-00 (C351-2000-302)

C351-2000-52

174290-26

174510-01 (C351-2000-224)

C351-2000-59

174291-21

174510-08 (C351-2000-231)

C351-2000-63

174291-23

174510-09 (C351-2000-232)

114006-01

174291-24

174510-10 (C351-2000-233)

174006-16

174501-00

174510-11 (C351-2000-234)

174006-30

Drop-Out Box Assemblies

115055-04

175112-11

175222-20

115055-10

175112-21

175222-21

175011-01

175112-90

175222-90

175015-00

175205-00

175224-00

175016-00

175210-00

175242-00

175105-00

175215-01

175242-01

175109-00

175222-11

175242-02

175112-10

175222-13

175303-00

175308-00

\n```\n\nEmergency Oxygen Portable Assemblies\n\n| 176960-13 | 176980-00 | 176965-SCOB2 |\n| --------- | ----------- | ------------ |\n| 176960-14 | 176965-SMB2 | 176965-SMO2 |\n| | | 176965-SCMB2 |\n\nRequirement: 1. Inspect the passenger or portable oxygen masks for any tear in the face cushion in accordance with Nellcor Puritan-Bennett Service Bulletin no C351-2000-35-1 Revision 2 dated February 1998.\n\n 2. If a tear is found during the Requirement 1 inspection, replace or repair the mask in accordance with the Service Bulletin.\n\n 3. No Puritan-Bennett oxygen mask, identified in the Applicability Statement of this Directive, may be installed in any aircraft unless Requirement 1 has been complied with.\n\nNote: FAA AD 99-08-21 Amdt 39-11130 refers.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nCompliance: 1. Prior to 17 December 1999.\n\n 2. Before further flight.\n\n 3. As of the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 17 June 1999.\n\nBackground: The FAA has received a number of reports of defective oxygen masks. The defective masks could cause injury to passengers by not being able to deliver sufficient oxygen if they where required to be used in an emergency.\n\nThis Directive requires the inspection and, if necessary, either the repair or replacement of the defective masks.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive addressing a specific manufacturing defect in a defined batch of oxygen masks. The scope remains precisely limited to the identified safety issue without expansion into broader regulatory areas."},"complexity_factors":["Extensive part number lists (40+ specific part numbers across three categories: passenger masks, drop-out box assemblies, and portable emergency assemblies)","Date-based applicability filter (elastomer cure dates between September 1993 and March 1997)","External reference dependency (requires compliance with Nellcor Puritan-Bennett Service Bulletin C351-2000-35-1 Revision 2, which is not reproduced in the directive)","Three-tier compliance structure with different deadlines (inspection deadline, immediate repair requirement, installation ban effective date)","Cross-reference to foreign regulation (FAA AD 99-08-21 Amdt 39-11130)"],"plain_english_summary":"This is a **safety order** issued by Australia's Civil Aviation Safety Authority (CASA) requiring airlines and aircraft operators to check specific oxygen masks made by Puritan-Bennett.\n\n**What it does:**\n- **Targets:** Specific passenger and portable oxygen masks used on aircraft, manufactured between September 1993 and March 1997 (identified by 40+ different part numbers).\n- **The problem:** These masks may have tears in the rubber face cushion (the \"elastomer\" part). If torn, they might not deliver enough oxygen during an emergency, potentially injuring passengers.\n- **What must happen:**\n 1. **Inspect** all affected masks for tears by following a specific manufacturer bulletin (Service Bulletin C351-2000-35-1 Revision 2).\n 2. **Fix or replace** any torn masks immediately before the aircraft flies again.\n 3. **Ban installation** of any unchecked masks in aircraft from the directive's effective date.\n\n**Who it affects:**\n- Airlines and aircraft operators using these specific Puritan-Bennett oxygen masks.\n- Maintenance crews responsible for safety checks.\n\n**Why it matters:**\nThis prevents a potentially deadly situation where passengers might not receive life-saving oxygen during cabin decompression or other emergencies. The order aligns with a similar US Federal Aviation Administration (FAA) directive, showing this was an international safety concern.\n\n**Deadlines:**\n- Inspections must be completed by **17 December 1999**.\n- Any torn masks found must be fixed **before the next flight**.\n- The ban on installing unchecked masks starts **17 June 1999**."},"summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive applies only to Puritan-Bennett passenger and portable oxygen masks with elastomer cure dates between September 1993 and March 1997, as listed. It does not affect other oxygen system components or masks outside the specified part numbers and date range."},"complexity_factors":["Highly specific list of affected part numbers and elastomer cure date range","Cross-references to a manufacturer service bulletin and an overseas FAA airworthiness directive"],"plain_english_summary":"This AD requires Australian operators and maintenance organisations to inspect specific Puritan‑Bennett passenger and portable oxygen masks (cure dates Sept 1993–Mar 1997) for tears in the face cushion per Nellcor Puritan‑Bennett Service Bulletin C351‑2000‑35‑1 Rev 2, and to repair or replace any defective masks. \n\nThe deadline (17 Dec 1999/before next flight) has passed, but any affected masks still in service or storage must be inspected before installation or use; the action mirrors FAA AD 99‑08‑21."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based on the text provided, the Directive implements inspection and repair/replacement obligations confined to the listed Puritan‑Bennett masks with the specified cure dates and part numbers and adds a prohibition on installing uninspected units. The Directive does not expand scope beyond those listed items or add additional regulatory obligations beyond inspection, repair/replacement per the Service Bulletin, and the installation prohibition."},"complexity_factors":["Long list of specific part numbers to identify affected units increases administrative effort.","Applicability limited by elastomer cure date range (Sept 1993–Mar 1997), requiring record checks of manufacturing/repair documentation.","Mandated inspection procedure and remedy must follow a specific service bulletin, creating dependence on that manufacturer's instructions.","Absolute prohibition on installing listed masks until inspected creates operational constraints on spares management.","Fixed compliance deadlines (effective date and prior-to date) require scheduling across fleets and maintenance providers.","Potential need to coordinate repairs or replacement parts supply if defects are widespread."],"plain_english_summary":"This Airworthiness Directive requires operators and maintenance organisations to inspect specified Puritan‑Bennett C351‑2000 series passenger and portable oxygen masks (those with elastomer cure dates between September 1993 and March 1997) for tears in the face cushion, and to repair or replace any defective masks per the referenced service bulletin. It also forbids installing any listed mask unless that inspection has been completed. The directive affects aircraft owners/operators and maintenance providers, who bear the inspection and repair or replacement costs to meet the stated safety objective."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks","history":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks/history","analysis":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks/analysis","conflicts":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks/conflicts","importantCases":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks/important-cases","documents":"/api/acts/ad-oxy-19-puritan-bennett-oxygen-masks/documents"}}