# Proposed AD FAA-2021-0560: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-21-04
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 9, 2021, 86 FR 36243
- Comments due: August 23, 2021
- Became: [AD 2021-21-04](https://openairdocs.org/ad/2021-21-04)
- Docket: FAA-2021-0560 (https://www.regulations.gov/docket/FAA-2021-0560, where comments are filed)
- Project: MCAI-2021-00192-T
- FR document: 2021-14611
- Official PDF: https://openairdocs.org/files/sha256/a3/cb/a3cb2227bb391f83ae84d3c78f493c3dd92a20873502ef8d5bea33629c489b21 (from https://www.govinfo.gov/content/pkg/FR-2021-07-09/pdf/2021-14611.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/07/09/2021-14611/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/919B9B64D99A12378625870D0075F9D5.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0560

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This proposed AD was prompted by reports that the sliding bushings in the forward engine mount system were missing. This proposed AD would require an inspection (gap check) of the front and aft engine mounts to verify the proper installation of the sliding bushings, and repair if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jul 9, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-14611, comments due Aug 23, 2021 (https://www.federalregister.gov/documents/2021/07/09/2021-14611/airworthiness-directives-bombardier-inc-airplanes)

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