# Proposed AD FAA-2019-0987: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-12-13
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 27, 2019, 84 FR 71335
- Comments due: February 10, 2020
- Became: [AD 2020-12-13](https://openairdocs.org/ad/2020-12-13)
- Docket: FAA-2019-0987 (https://www.regulations.gov/docket/FAA-2019-0987, where comments are filed)
- FR document: 2019-27768
- Official PDF: https://openairdocs.org/files/sha256/40/60/4060fd5db6a268230e29dafabfb345533ca82133d68a72fc8e080ebc7879b51f (from https://www.govinfo.gov/content/pkg/FR-2019-12-27/pdf/2019-27768.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/12/27/2019-27768/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B3DB8C2E03F6D2FF862584DD005CCBCB.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0987

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by reports that during airplane wing fatigue testing, fatigue cracks were found on the lower right-hand-side wing plank at the end of the integrally machined stringers, which led to a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require, for certain airplanes, revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 27, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-27768, comments due Feb 10, 2020 (https://www.federalregister.gov/documents/2019/12/27/2019-27768/airworthiness-directives-bombardier-inc-airplanes)

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