# Proposed AD 98-CE-29-AD: Puritan-Bennett Aero Systems Company C351-2000 Series Passenger Oxygen Masks and Portable Oxygen Masks

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-08-21
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 22, 1998, 63 FR 50540
- Comments due: November 26, 1998
- Became: [AD 99-08-21](https://openairdocs.org/ad/99-08-21)
- Docket: 98-CE-29-AD
- FR document: 98-25216
- Official PDF: https://openairdocs.org/files/sha256/7f/43/7f43b8b6679942c21d4af2781ce5953e7ef5e871931b6315314a3442b62c3f09 (from https://www.govinfo.gov/content/pkg/FR-1998-09-22/pdf/98-25216.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/09/22/98-25216/airworthiness-directives-puritan-bennett-aero-systems-company-c351-2000-series-passenger-oxygen
- Page: https://openairdocs.org/proposed/98-CE-29-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to any aircraft equipped with Puritan-Bennett Aero Systems Company (Puritan-Bennett) C351-2000 series passenger oxygen masks and portable oxygen masks. The proposed AD would require inspecting the passenger and portable oxygen masks for tears around the face cushion adjacent to the inner mask housing, and replacing or repairing any torn passenger or portable oxygen mask. Reports received from three airplane manufacturers of defective oxygen masks prompted the proposed action. The actions specified by the proposed AD are intended to prevent reduced oxygen consumption when passengers are required to use defective oxygen masks, which could result in passenger injury.

## Notices in this docket

- Sep 22, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-25216, comments due Nov 26, 1998 (https://www.federalregister.gov/documents/1998/09/22/98-25216/airworthiness-directives-puritan-bennett-aero-systems-company-c351-2000-series-passenger-oxygen)

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