# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule; request for comments. · Published 2020-07-09 · Effective 2020-07-24 · 85 FR 41180
## Document
- **Document number:** 2020-14779
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 85 FR 41180
- **Publication date:** 2020-07-09
- **Effective date:** 2020-07-24
- **FAA docket:** Docket No. FAA-2020-0575
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by a report that certain safety valves at the left- and right-hand sides of the cabin pressure control system were not installed correctly and that the trunnion nuts used to fasten the V-band clamp were over torqued. This AD requires a measurement of the trunnion nut torque of the V-band clamp, an inspection of the safety valve and airplane bulkhead flange area for any cracking and deformations, and corrective actions, if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/07/09/2020-14779/airworthiness-directives-bombardier-inc-airplanes)
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