# Proposed AD FAA-2022-0592: MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-18-17
- Products: MHI RJ Aviation ULC
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 2, 2022, 87 FR 33454
- Comments due: July 18, 2022
- Became: [AD 2022-18-17](https://openairdocs.org/ad/2022-18-17)
- Docket: FAA-2022-0592 (https://www.regulations.gov/docket/FAA-2022-0592, where comments are filed)
- Project: MCAI-2021-01023-T
- FR document: 2022-11803
- Official PDF: https://openairdocs.org/files/sha256/08/08/08086b4691dd61fffbb8a6e4378b1080a3194eb3235e6f22e59ce960816ebd8a (from https://www.govinfo.gov/content/pkg/FR-2022-06-02/pdf/2022-11803.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/06/02/2022-11803/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-11803-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0592

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL-600-2D24 (Regional Jet Series 900) airplanes. This proposed AD was prompted by a report of a manufacturing error that can create dents on the lower wing plank, close to the flap arm locations at certain wing stations; as a result, cracks could develop and weaken the structural integrity of the wings before being detected by any existing required inspections. This proposed AD would require an inspection for damage (including dents, cracks, discoloration, gouges, scratches, or other surface damage) of the lower wing plank in the flap arm areas at certain wing stations, and repair if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 2, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-11803, comments due Jul 18, 2022 (https://www.federalregister.gov/documents/2022/06/02/2022-11803/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc)

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