# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule; request for comments. · Published 2023-07-12 · Effective 2023-07-27 · 88 FR 44205
## Document
- **Document number:** 2023-14769
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 88 FR 44205
- **Publication date:** 2023-07-12
- **Effective date:** 2023-07-27
- **FAA docket:** Docket No. FAA-2023-1406
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2023-03- 06, which applied to all Bombardier, Inc., Model BD-700-1A10 and BD- 700-1A11 airplanes. AD 2023-03-06 required revising the existing airplane flight manual (AFM) to incorporate limitations to mitigate identified hazards when in the presence of interference from wireless broadband operations in the 3.7-3.98 GHz frequency band (5G C-Band) as identified by Notices to Air Missions (NOTAMs). Since the FAA issued AD 2023-03-06, the FAA determined that additional limitations are needed due to the continued deployment of new 5G C-Band stations whose signals are expected to cover most of the contiguous United States at transmission frequencies between 3.7-3.98 GHz. This AD requires revising the limitations section of the existing AFM to incorporate limitations prohibiting dispatch under a certain master minimum equipment list (MMEL) item. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/07/12/2023-14769/airworthiness-directives-bombardier-inc-airplanes)
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