# Proposed AD FAA-2017-0621: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-02-16
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 21, 2017, 82 FR 28269
- Comments due: August 7, 2017
- Became: [AD 2018-02-16](https://openairdocs.org/ad/2018-02-16)
- Docket: FAA-2017-0621 (https://www.regulations.gov/docket/FAA-2017-0621, where comments are filed)
- Project: 2017-NM-049-AD
- FR document: 2017-12803
- Official PDF: https://openairdocs.org/files/sha256/96/6a/966a61d8126a0256c76081f4ec7b1f54b504eeccb79583f82ba76b1a15673ce3 (from https://www.govinfo.gov/content/pkg/FR-2017-06-21/pdf/2017-12803.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/06/21/2017-12803/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BFB99EC9D9919CD086258146004C9922.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0621

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-400 series airplanes. This proposed AD was prompted by reports that operation of fuselage doors was interrupted due to corrosion in certain door roller bearings. This proposed AD would require a one-time detailed inspection of the bearings for corrosion, and replacement if necessary. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 21, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-12803, comments due Aug 7, 2017 (https://www.federalregister.gov/documents/2017/06/21/2017-12803/airworthiness-directives-bombardier-inc-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.