# Proposed AD FAA-2021-0462: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-20-13
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 14, 2021, 86 FR 31453
- Comments due: July 29, 2021
- Became: [AD 2021-20-13](https://openairdocs.org/ad/2021-20-13)
- Docket: FAA-2021-0462 (https://www.regulations.gov/docket/FAA-2021-0462, where comments are filed)
- Project: MCAI-2020-01714-T
- FR document: 2021-12351
- Official PDF: https://openairdocs.org/files/sha256/1c/50/1c5036551caa65405ab8e2e9b8828d7eb1d84a20e57f716e3d94f948d5d62d04 (from https://www.govinfo.gov/content/pkg/FR-2021-06-14/pdf/2021-12351.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/06/14/2021-12351/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88A4D13916BEBBD1862586F500483079.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0462

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., CL-600-2B16 (604 Variant) airplanes. This proposed AD was prompted by multiple reports of cracking of the main landing gear (MLG) shock strut lower pin. This proposed AD would require repetitive lubrication and repetitive detailed visual inspections (DVI) and non-destructive test (NDT) inspections of the MLG shock strut lower pins, and replacement if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 14, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-12351, comments due Jul 29, 2021 (https://www.federalregister.gov/documents/2021/06/14/2021-12351/airworthiness-directives-bombardier-inc-airplanes)

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