# Proposed AD FAA-2026-13808: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comments due Dec 28
- Products: Bombardier CL-600-2B16 (601-3A Variant), CL-600-2B16 (601-3R Variant) and CL-600-2B16 (604 Variant)
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 10, 2026, 91 FR 72467
- Comments due: December 28, 2026
- Docket: FAA-2026-13808 (https://www.regulations.gov/docket/FAA-2026-13808, where comments are filed)
- Project: MCAI-2024-00785-T
- FR document: 2026-22899
- Official PDF: https://openairdocs.org/files/sha256/20/48/2048ae95ef34dd9e76641e4d525c84e8f7a5c305a3b13c6c6309ce915504ef14 (from https://www.govinfo.gov/content/pkg/FR-2026-11-10/pdf/2026-22899.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/11/10/2026-22899/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-22899-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-13808

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2B16 (604 Variants) airplanes. This proposed AD was prompted by reports of cracks being found on the lower wing plank at the rear spar wing station (WS) 59 to WS 65 web and/or flange. This proposed AD would require inspecting the lower wing plank rear spar web and lower flange, the forward surface of the pressure bulkhead frame under the stiffeners, and the vertical stabilizer front spar to frame attachment fitting lower legs for cracks, and repair or rectification if applicable. The FAA is proposing this AD to address the unsafe condition on these products.

## Docket FAA-2026-13808 (1)

The documents in the docket on regulations.gov (https://www.regulations.gov/docket/FAA-2026-13808), oldest first. Comments are on regulations.gov.

- [Airworthiness Directives: Bombardier, Inc., Airplanes](https://www.regulations.gov/document/FAA-2026-13808-0001) (Proposed rule, posted Nov 10, 2026)

## Notices in this docket

- Nov 10, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-22899, comments due Dec 28, 2026 (https://www.federalregister.gov/documents/2026/11/10/2026-22899/airworthiness-directives-bombardier-inc-airplanes)

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