# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2021-10-13 · Effective 2021-11-17 · 86 FR 56833
## Document
- **Document number:** 2021-22198
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 56833
- **Publication date:** 2021-10-13
- **Effective date:** 2021-11-17
- **FAA docket:** Docket No. FAA-2021-0563
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by a report that during flight tests, the opening of the ram air outlet flaps was found to cause a disturbance of the air flow around the ram air turbine (RAT) when the landing gear (L/G) is extended. This AD requires revising the existing airplane flight manual (AFM) and applicable corresponding operational procedures to provide procedures for all engines failure and L/G gravity extension related to certain software, and installing Airbus temporary quick change (ATQC) V3 for the flight warning system (FWS) software (SW) standard (STD) 6/ 2.0, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/10/13/2021-22198/airworthiness-directives-airbus-sas-airplanes)
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