# Proposed AD FAA-2026-2714: MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-15-16
- Products: MHI RJ Aviation ULC
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 17, 2026, 91 FR 12695
- Comments due: May 1, 2026
- Became: [AD 2026-15-16](https://openairdocs.org/ad/2026-15-16)
- Docket: FAA-2026-2714 (https://www.regulations.gov/docket/FAA-2026-2714, where comments are filed)
- Project: MCAI-2025-00827-T
- FR document: 2026-05224
- Official PDF: https://openairdocs.org/files/sha256/0b/bb/0bbbb26ce56ad249f94d8f2812995fb088ba0eb0446816086fd37390c763b6ea (from https://www.govinfo.gov/content/pkg/FR-2026-03-17/pdf/2026-05224.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/03/17/2026-05224/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-05224-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-2714

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) airplanes. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require 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

- Mar 17, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-05224, comments due May 1, 2026 (https://www.federalregister.gov/documents/2026/03/17/2026-05224/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc)

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