Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Time Pressure; Situational Awareness; Distraction; Communication Breakdown; Workload
ATC Issue All Types; Conflict NMAC; Deviation - Altitude Excursion From Assigned Altitude
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Airspace Structure; Environment - Non Weather Related; Procedure; Human Factors
It was the First Officer's leg from ZZZ1 to ZZZ. We were flying Flight ABCA. We were flying Aircraft X. On descent into ZZZ; we were cleared to descend via a STAR arrival. We were then given a level off altitude of FL250. We received a TCAS alert from traffic at our 10 O'clock position...'Traffic Traffic'...then a few seconds later we received a RA to 'Climb Climb'. I notified ATC that we received a RA and that we were climbing. The First Officer immediately disconnected the autopilot and auto throttles and executed a climb. At FL255 the TCAS system said; 'Clear of Conflict'. We returned to FL 250. ATC then re-cleared us to descend via the STAR arrival again. We landed on Runway XXR (previously XYR) and taxied into our Gate X at ZZZ.ATC climbed an aircraft within approximately 500 feet of us; we received an RA and reacted to it.Better situational awareness by the ATC controller.
While flying the STAR RNAV arrival into ZZZ; we were given a number of step-down descents that kept us above our programmed VNAV descent path. Approaching ZZZZZ at the 12 o'clock position was an aircraft flying at us and climbing toward our altitude. We were at FL250 and received a TCAS RA directing a climb to FL255 with which we complied. We notified ATC of our TCAS RA response. After clear of traffic; we descended back to FL250 and resumed the arrival.Immediately after this occurrence; we changed frequencies. Perhaps this traffic conflict was a result of miscommunication between the two controllers.I am surprised that the ATC controllers would not have received an alert about two aircraft on a collision course. We routinely receive many irrelevant traffic alerts; but in this instance; we heard nothing from ATC.
Air carrier pilots reported receiving an RA while descending. The pilot flying started a climb until receiving ' clear of conflict.' The other aircraft was also an air carrier tracking towards the reporting pilots. There was no alert from ATC according to the reporter.