# Proposed AD FAA-2016-9226: NavWorx, Inc. Automatic Dependent Surveillance Broadcast Universal Access Transceiver Units

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-11-11
- Products: NavWorx
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 20, 2016, 81 FR 72552
- Comments due: December 19, 2016
- Became: [AD 2017-11-11](https://openairdocs.org/ad/2017-11-11)
- Docket: FAA-2016-9226 (https://www.regulations.gov/docket/FAA-2016-9226, where comments are filed)
- Project: 2016-SW-065-AD
- FR document: 2016-25255
- Official PDF: https://openairdocs.org/files/sha256/e8/8b/e88b6906df9da4efcddae767257e8fc9673e8c582e5d97cc3aae4a89a79fa744 (from https://www.govinfo.gov/content/pkg/FR-2016-10-20/pdf/2016-25255.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/10/20/2016-25255/airworthiness-directives-navworx-inc-automatic-dependent-surveillance-broadcast-universal-access
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/30F1C15C8D417B1E8625805300497983.0001
- Page: https://openairdocs.org/proposed/FAA-2016-9226

## Summary

We propose to adopt a new airworthiness directive (AD) for NavWorx, Inc. (NavWorx) Automatic Dependent Surveillance Broadcast (ADS-B) Universal Access Transceiver Units (unit). This proposed AD would require removing the ADS-B unit and would prohibit installing the affected unit on any aircraft. This proposed AD is prompted by a design change for the unit to broadcast a Source Integrity Level (SIL) of 3 when the uncertified internal global positioning system (GPS) source necessitates a SIL of 0. The proposed actions are intended to prevent an ADS-B unit from communicating unreliable position information to Air Traffic Control (ATC) and nearby aircraft, resulting in a potential aircraft collision.

## Notices in this docket

- Oct 20, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-25255, comments due Dec 19, 2016 (https://www.federalregister.gov/documents/2016/10/20/2016-25255/airworthiness-directives-navworx-inc-automatic-dependent-surveillance-broadcast-universal-access)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.