# Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes; Correction
> **Rule** · Final rule; correction. · Published 2023-04-12 · Effective 2023-04-28 · 88 FR 21900
## Document
- **Document number:** 2023-07588
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 88 FR 21900
- **Publication date:** 2023-04-12
- **Effective date:** 2023-04-28
- **FAA docket:** Docket No. FAA-2022-0679
## Abstract

The FAA is correcting an airworthiness directive (AD) that was published in the Federal Register. That AD applies to all MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) airplanes, Model CL-600-2C11 (Regional Jet Series 550) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model C-600-2E25 (Regional Jet Series 1000) airplanes. As published, a portion of the initial compliance time for doing the new ram-air valve task specified in the regulatory text for certain airplanes is incorrect. This document corrects that error. In all other respects, the original document remains the same.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/04/12/2023-07588/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc)
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