EMB ERJ 170/175 ER/LR
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem; Flight Crew Regained Aircraft Control; Flight Crew FLC Overrode Automation
Aircraft
We noticed on the STAR portion of the arrival the FMS (Flight Management System) was not properly sequencing the arrival. The FMS wanted to take the plane off course. We notified ATC and they gave us a heading and altitude to fly. We thought we were able to correct the issue with FMS and ATC gave a new clearance to fly directly to the IAF on the RNAV Y RNW 27 ZZZ and as we flew on course to the IAF ZZZZZ we were cleared to fly the approach. We selected the approach altitude and started flying the approach. The autopilot was on and the FMS took the airplane off course in IMC. We were about 300 feet below that correct altitude. I overrode the autopilot and told the Captain what was happening. He took over the controls. We set the LOC frequency and told ATC that we lost all navigation. About 15 seconds later we broke out of the clouds and flew a visual approach. We landed the airplane safely. On the ground we notified Maintenance. Total FMS navigation failure. Recommend maintain vigilance and notify ATC immediately when anything like this happens and ask for a heading and altitude right away.
EMB-175 flight crew reported experiencing a Flight Management System Failure.