# Proposed AD FAA-2023-1708: Embraer S.A. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-21-04
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 14, 2023, 88 FR 54941
- Comments due: September 28, 2023
- Became: [AD 2023-21-04](https://openairdocs.org/ad/2023-21-04)
- Docket: FAA-2023-1708 (https://www.regulations.gov/docket/FAA-2023-1708, where comments are filed)
- Project: MCAI-2023-00554-A
- FR document: 2023-16989
- Official PDF: https://openairdocs.org/files/sha256/68/2e/682e5531b2054aea72817fedf52129474824b58165f674164bf748c912941b0a (from https://www.govinfo.gov/content/pkg/FR-2023-08-14/pdf/2023-16989.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/08/14/2023-16989/airworthiness-directives-embraer-sa-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-16989-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-1708

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Embraer S.A. (Embraer) Model EMB-505 airplanes. This proposed AD was prompted by occurrences of an uncommanded change in the setting of the barometric pressure in both primary flight displays (PFDs). This proposed AD would require installing a new version of the airplane avionics system software, as specified in an Ag[ecirc]ncia Nacional de Avia[ccedil][atilde]o Civil (ANAC) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 14, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-16989, comments due Sep 28, 2023 (https://www.federalregister.gov/documents/2023/08/14/2023-16989/airworthiness-directives-embraer-sa-airplanes)

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