# Proposed AD FAA-2017-0659: Rockwell Collins, Inc. Traffic Surveillance System Processing Unit

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-22-14
- Products: Rockwell Collins
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 3, 2017, 82 FR 30802
- Comments due: August 17, 2017
- Became: [AD 2017-22-14](https://openairdocs.org/ad/2017-22-14)
- Docket: FAA-2017-0659 (https://www.regulations.gov/docket/FAA-2017-0659, where comments are filed)
- Project: 2017-CE-014-AD
- FR document: 2017-13948
- Official PDF: https://openairdocs.org/files/sha256/e9/b4/e9b41b622d773b7e7b272bbb7bd0ebe32c83a27cbeda63fb918d5a52d792f2b9 (from https://www.govinfo.gov/content/pkg/FR-2017-07-03/pdf/2017-13948.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/07/03/2017-13948/airworthiness-directives-rockwell-collins-inc-traffic-surveillance-system-processing-unit
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A2A3EDB5B547CB98862581520054E88C.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0659

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Rockwell Collins, Inc. TSS-4100 Traffic Surveillance System Processing Units that incorporate TSSA-4100 Field Loadable Software (FLS) Rockwell Collins part numbers 810-0052-002/ -003/-010/-011/-012/- 100/-101 and are installed on airplanes. This proposed AD was prompted by five instances of air traffic control observing coasting (extrapolated stale data) of automatic dependent surveillance-broadcast data (position/ velocity data). This proposed AD would require installing the TSSA-4100 FLS upgrades on the TSS-4100 units. We are proposing this AD to correct the unsafe condition on these products.

## Notices in this docket

- Jul 3, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-13948, comments due Aug 17, 2017 (https://www.federalregister.gov/documents/2017/07/03/2017-13948/airworthiness-directives-rockwell-collins-inc-traffic-surveillance-system-processing-unit)

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