Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 138.68; Flight Crew Total 10798.08; Flight Crew Type 7553.10
Other / Unknown; Confusion; Communication Breakdown; Time Pressure; Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Human Factors
I went off of comm one briefly to call ramp.  We were approaching taxiway 1 for the ramp and parking. I got cleared in from ramp.  I turned my head up and left and saw Aircraft Y that seemed to fill the entire windshield. The Captain was already starting to brake and I added additional braking from my side because he was so close. I told ground we almost hit Aircraft Y. Ground said sorry.  Aircraft Y said ground told him we would give way.  I never heard that clearance or acknowledged it.  Aircraft Y was taxiing fast down taxiway 1. Was not stopping for anything obviously.
Landed at ZZZ; taxi instructions taxiway 3; 2; 1 to enter ramp for gate.Making the left turn from 2 onto 1; had to slam on the breaks to avoid a collision with Aircraft Y traveling at a high rate of speed southbound on taxiway 1. Asked ground what happened and they said 'sorry' while Aircraft Y stated that we were supposed to give way to them.We did not hear or acknowledge any such instructions. Continued the taxi to gate.
Air Carrier Pilots reported a critical ground conflict during taxi to their ramp/gate. The pilots were forced to initiate an abrupt stop just prior to entering a taxiway. Another aircraft; was proceeding down the taxiway and was not going to yield. The pilots reported they did not hear any instructions or acknowledge to yield for the other aircraft.