Honeywell to Use Time Triggered Ethernet in Next Generation Flight Management System

September 29, 2025

TTTECH Aerospace’s TTEthernet End System solution has been chosen by Honeywell Aerospace Technologies for the data network in its next-generation flight management system (nFMS) for air transport aircraft, extending the companies’ successful collaboration of more than two decades.

The nFMS serves as the “brain” of modern airliners and is responsible for navigation, performance calculations, and guiding the aircraft efficiently along a planned route.

The Honeywell flight management system (FMS) integrates TTTECH Aerospace’s Deterministic TTEthernet End System solution for data transfer according to IEEE 802.3, ARINC 664 part 7, and SAE AS6802 thus enabling enhanced connectivity with these open networking standards, allowing the Honeywell nFMS to be used on as many current and future aircraft programs as possible.

TTTECH Aerospace’s TTEthernet End System solution supports Honeywell’s new nFMS requirements to provide new capabilities, new levels of upgradeability, and enhanced modularity.

“TTTECH Aerospace’s proven expertise in delivering safety-critical, high-performance data network solutions has made them a trusted partner for Honeywell,” said Vipul Gupta, Vice President & General Manager of Avionics, Honeywell Aerospace. “We have successfully integrated their TTEthernet End System solutions into many of our products and are happy to extend the very good collaboration with the next-generation flight management system project.”

TTEthernet is an open standards-based, commercial product implementation of Deterministic Ethernet that uniquely enables the use of three traffic classes in parallel on one physical medium without interference (“regular” Ethernet according to IEEE 802.3, rate-constrained traffic according to ARINC 664 part 7, and Time-Triggered Ethernet according to SAE AS6802).

TTTECH and Honeywell have been successfully collaborating on projects in different sectors for more than two decades, from engine control projects to space (NASA Orion), and comprising large aircraft programs as well as the Honeywell Anthem™ flight deck that can scale from urban air mobility (UAM) to business jets and regional aircraft. TTTECH Aerospace provides mature solutions for dependable data transfer at speeds of up to 1 Gbit/s for the deterministic delivery of safety-critical data, onboard or on the ground.

The end systems are part of TTTECH Aerospace’s TTEthernet product portfolio for aviation that is DAL A certifiable and includes switches, end systems, tooling, and development and test systems.

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