# Proposed AD FAA-2017-0775: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-09-15
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 15, 2017, 82 FR 38626
- Comments due: September 29, 2017
- Became: [AD 2018-09-15](https://openairdocs.org/ad/2018-09-15)
- Docket: FAA-2017-0775 (https://www.regulations.gov/docket/FAA-2017-0775, where comments are filed)
- FR document: 2017-16777
- Official PDF: https://openairdocs.org/files/sha256/ac/9a/ac9af6aea8be51a2c7e5d191b9a5e91184037bda2727ed25e3dfba966f7dc63b (from https://www.govinfo.gov/content/pkg/FR-2017-08-15/pdf/2017-16777.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/08/15/2017-16777/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FC7D63A7336FDEA48625817D004F2B35.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0775

## Summary

We propose to supersede Airworthiness Directive (AD) 2016-25- 18, for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. AD 2016-25-18 requires an inspection for discrepancies of the attachment points of the links between the engine rear mount assemblies, and corrective actions if necessary. Since we issued AD 2016-25-18, we have determined that replacement of certain nuts and bolts in the engine rear mount assemblies is necessary. This proposed AD would require an inspection of certain attachment points, corrective action if necessary, and replacement of certain bolts and nuts in the engine rear mount assemblies. This proposed AD also adds airplanes to the applicability. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 15, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-16777, comments due Sep 29, 2017 (https://www.federalregister.gov/documents/2017/08/15/2017-16777/airworthiness-directives-bombardier-inc-airplanes)

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