# Proposed AD FAA-2020-0915: Rockwell Collins, Inc., Global Positioning Systems

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-08-07
- Products: Rockwell Collins
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 29, 2020, 85 FR 68501
- Comments due: December 14, 2020
- Became: [AD 2021-08-07](https://openairdocs.org/ad/2021-08-07)
- Docket: FAA-2020-0915 (https://www.regulations.gov/docket/FAA-2020-0915, where comments are filed)
- Project: AD-2020-00661-Q
- FR document: 2020-23812
- Official PDF: https://openairdocs.org/files/sha256/5f/07/5f075f255f5193784b9a3813fa2c8542f8f009d536ffb2becd70ce60d773276d (from https://www.govinfo.gov/content/pkg/FR-2020-10-29/pdf/2020-23812.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/10/29/2020-23812/airworthiness-directives-rockwell-collins-inc-global-positioning-systems
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EFD94A9917073AFA86258610005CF880.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0915

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Rockwell Collins, Inc. (Rockwell Collins), GPS-4000S Global Positioning Systems (GPS) installed on airplanes. This proposed AD was prompted by an un-annunciated GPS position error, which could cause a misleading localizer performance with vertical guidance (LPV) glidepath, resulting in controlled flight into terrain (CFIT). This proposed AD would require upgrading the GPS-4000S. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 29, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-23812, comments due Dec 14, 2020 (https://www.federalregister.gov/documents/2020/10/29/2020-23812/airworthiness-directives-rockwell-collins-inc-global-positioning-systems)

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