# Proposed AD FAA-2005-20628: Bombardier Model DHC-8-301, -311, and - 315 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-07-02
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 17, 2005, 70 FR 12981
- Comments due: April 18, 2005
- Became: [AD 2006-07-02](https://openairdocs.org/ad/2006-07-02)
- Docket: FAA-2005-20628 (https://www.regulations.gov/docket/FAA-2005-20628, where comments are filed)
- Project: 2004-NM-51-AD
- FR document: 05-5295
- Official PDF: https://openairdocs.org/files/sha256/ba/c7/bac730784f9012db706c2c48fa8effe8541d3c224d64984cf972691cce84b895 (from https://www.govinfo.gov/content/pkg/FR-2005-03-17/pdf/05-5295.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/03/17/05-5295/airworthiness-directives-bombardier-model-dhc-8-301--311-and--315-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1DB7C0B158CA76E286256FC70060B020.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20628

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model DHC-8-301, -311, and -315 airplanes. This proposed AD would require replacing the pressure control valve of the Type 1 emergency door. This proposed AD is prompted by reports that the pressure control valve of the Type 1 emergency door is susceptible to freezing. We are proposing this AD to ensure that the pressure control valve does not freeze and prevent the door seal from deflating, which could result in the inability to open the door in an emergency.

## Notices in this docket

- Mar 17, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-5295, comments due Apr 18, 2005 (https://www.federalregister.gov/documents/2005/03/17/05-5295/airworthiness-directives-bombardier-model-dhc-8-301--311-and--315-airplanes)

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