# Proposed AD FAA-2015-0822: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-17-15
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 13, 2015, 80 FR 19574
- Comments due: May 28, 2015
- Became: [AD 2015-17-15](https://openairdocs.org/ad/2015-17-15)
- Docket: FAA-2015-0822 (https://www.regulations.gov/docket/FAA-2015-0822, where comments are filed)
- Project: 2014-NM-210-AD
- FR document: 2015-08329
- Official PDF: https://openairdocs.org/files/sha256/b0/01/b001b4c582f65472dec9dddd9a8568aacf6c93cde932f582c8ea4fede4aeac36 (from https://www.govinfo.gov/content/pkg/FR-2015-04-13/pdf/2015-08329.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/04/13/2015-08329/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5B18B50669A8ECBC86257E2600473655.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0822

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This proposed AD was prompted by results of a design review indicating that the burst pressure of the flexible hose, used to vent oxygen from the high- pressure relief valve of the oxygen cylinder overboard, was lower than the opening pressure of the high-pressure relief valve, which could cause the flexible hose to burst before it can vent the excess oxygen overboard. This proposed AD would require replacing the oxygen hose assembly with a new, improved assembly. We are proposing this AD to prevent the accumulation of oxygen in an enclosed space, which could result in an uncontrolled oxygen-fed fire if an ignition source is nearby.

## Notices in this docket

- Apr 13, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-08329, comments due May 28, 2015 (https://www.federalregister.gov/documents/2015/04/13/2015-08329/airworthiness-directives-bombardier-inc-airplanes)

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