# Proposed AD FAA-2011-0139: B/E Aerospace, Continuous Flow Passenger Oxygen Mask Assembly, Part Numbers 174006-(), 174080-(), 174085-(), 174095-(), 174097-(), and 174098-()

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-14-08
- Products: B/E Aerospace
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 23, 2011, 76 FR 9984
- Comments due: April 11, 2011
- Became: [AD 2011-14-08](https://openairdocs.org/ad/2011-14-08)
- Docket: FAA-2011-0139 (https://www.regulations.gov/docket/FAA-2011-0139, where comments are filed)
- Project: 2010-CE-057-AD
- FR document: 2011-4046
- Official PDF: https://openairdocs.org/files/sha256/b9/e8/b9e8fb2ee26e97b3e51f9d2a9a2db268c5985ab7730b1ce428f77c839e8c9cb5 (from https://www.govinfo.gov/content/pkg/FR-2011-02-23/pdf/2011-4046.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/02/23/2011-4046/airworthiness-directives-be-aerospace-continuous-flow-passenger-oxygen-mask-assembly-part-numbers
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/153FD3096E0FCE6386257840004E384B.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0139

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above, except for those that are currently affected by similar action through any of five ADs applicable to Boeing products. This proposed AD would require an inspection/records check to determine the manufacturer and part number of the oxygen mask assemblies installed, an inspection to determine the manufacturing date and modification status if certain oxygen mask assemblies are installed, and corrective action for certain oxygen mask assemblies. This proposed AD was prompted by a report that several oxygen mask assemblies with broken in-line flow indicators were found following a mask deployment. We are proposing this AD to prevent the in-line flow indicators of the oxygen mask assembly from fracturing and separating, which could inhibit oxygen flow to the masks. This condition could consequently result in occupants developing hypoxia following a depressurization event.

## Notices in this docket

- Feb 23, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-4046, comments due Apr 11, 2011 (https://www.federalregister.gov/documents/2011/02/23/2011-4046/airworthiness-directives-be-aerospace-continuous-flow-passenger-oxygen-mask-assembly-part-numbers)

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