Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
ATC Issue All Types; Conflict Ground Conflict; Critical
Flight Crew Took Evasive Action
Human Factors
After landing on Runway 22L we exited the runway via Taxiway P; E and held short of Runway 22R at E. We were talking to Tower on Frequency 128.80. Tower advised to cross Runway 22R on E and contact ground on Frequency 121.9 once crossed. The Captain taxied across Runway 22R and I was contacting ground on 121.90 when we realized there was an Air Carrier Y coming strait at us on Taxiway E. The Captain stopped immediately and I tried to contact ground. Ground Control was very busy and I was unable to get a response from him. I continued to try and contact ground by saying something along the lines of ground Air Carrier X I think our tail is still across the hold short line on Runway 22R and that there was an aircraft coming strait at us from Taxiway E. I believe ground still did not respond. By this time the Air Carrier Y was about 50 feet in front of us and still coming. I said to the Captain; 'he's going to hit us.' The Captain then turned on every light we had so as to have the Air Carrier Y stop. I yelled on the radio multiple times to 'stop!' The Air Carrier Y kept coming. Ground still did not respond. I then again said the Air Carrier Y in front of us stop you are going to hit us. A voice came on and said; 'I can see my wing I'm fine; I'm not going to hit you;' I said 'yes you are; STOP!' The Air Carrier Y kept coming slower; but turned to cut the corner of Taxiway E and B; exactly where we were sitting. By the time the Air Carrier Y went past us; it's front tires were about 5 feet left of the taxiway line (cutting the inside of the corner) I would calculate the winglet of the Air Carrier Y was about 5 feet from our front windshield. My Captain kept the lights on the whole time and never moved the airplane; if he would have moved there would have been a collision. Once the Air Carrier Y passed I was finally able to get taxi confirmation from ground to continue to the gate.I believe the event occurred because the pilot of the Air Carrier Y was arrogant. This is most prevalent in my mind because of the tone of voice that was given when he said; he would not hit us. Also Ground not realizing that Tower had cleared us to cross and contact Ground Control. This is a hotspot on the airport.Suggestions: Ground and Tower to have better communication between each other. More vigilance from pilots to not continue when another pilot advises to stop.
Air carrier First Officer reported experiencing a ground conflict during taxi-in at BOS airport.