# Proposed AD FAA-2022-0885: MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-21-10
- Products: MHI RJ Aviation ULC
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 21, 2022, 87 FR 43450
- Comments due: September 6, 2022
- Became: [AD 2022-21-10](https://openairdocs.org/ad/2022-21-10)
- Docket: FAA-2022-0885 (https://www.regulations.gov/docket/FAA-2022-0885, where comments are filed)
- Project: MCAI-2021-01429-T
- FR document: 2022-15558
- Official PDF: https://openairdocs.org/files/sha256/75/f9/75f93086a4296ac5759062bed0a660bc95e1caf23d76bf5425b5a4ce289407fd (from https://www.govinfo.gov/content/pkg/FR-2022-07-21/pdf/2022-15558.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/07/21/2022-15558/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-15558-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0885

## 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); CL-600-2D24 (Regional Jet Series 900); and CL-600-2E25 (Regional Jet Series 1000) airplanes. This proposed AD was prompted by reports that the landing gear age of certain airplanes was higher than expected for gear overhaul, which could increase the risk of corrosion. This proposed AD would require verifying the calendar age of the nose landing gear (NLG) and main landing gear (MLG) by way of component maintenance documents, and performing corrective actions if necessary. This proposed AD would also prohibit installing certain components. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jul 21, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-15558, comments due Sep 6, 2022 (https://www.federalregister.gov/documents/2022/07/21/2022-15558/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc)

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