# Proposed AD FAA-2021-0093: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-10-02
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 24, 2021, 86 FR 11180
- Comments due: April 12, 2021
- Became: [AD 2021-10-02](https://openairdocs.org/ad/2021-10-02)
- Docket: FAA-2021-0093 (https://www.regulations.gov/docket/FAA-2021-0093, where comments are filed)
- Project: MCAI-2020-01213-T
- FR document: 2021-03588
- Official PDF: https://openairdocs.org/files/sha256/e0/d9/e0d97dc527243aecddf88b78e3b5c24839c49f739797601f367206156833f82e (from https://www.govinfo.gov/content/pkg/FR-2021-02-24/pdf/2021-03588.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/02/24/2021-03588/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/54AE9664C79762F186258686005CDADE.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0093

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This proposed AD was prompted by reports indicating that the left- and right-hand elevator torque tube bearings were contaminated with sand and corrosion, restricting free rotation. This proposed AD would require repetitive general visual inspections of the left- and right- hand elevator torque tube bearings for any sand, dust, or corrosion; repetitive functional tests of the elevator control system; and replacement of the elevator torque tube bearings if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 24, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-03588, comments due Apr 12, 2021 (https://www.federalregister.gov/documents/2021/02/24/2021-03588/airworthiness-directives-bombardier-inc-airplanes)

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