Light Transport
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Human-Machine Interface; Communication Breakdown
ATC Issue All Types; Airspace Violation All Types; Conflict Airborne Conflict
Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Procedure; Environment - Non Weather Related; Airspace Structure; Aircraft; Airport
We were in the Phoenix Class B airspace; about 1 mile south of DVT 6;000 feet assigned by ATC. We had just gotten a frequency change to the Approach Controller and checked in; when a TCAS TA had gone off; showing traffic below us to our 1 o'clock. I check in that direction and immediately see traffic that we were overtaking; and was not a factor. About 4 seconds later I look more to my 2 to 3 o'clock and find another aircraft under us heading away from us to the right even closer to us (still not a factor). At this point the TCAS gives us another TA; and I look at the 2 aircraft I noticed earlier to make sure they're still in sight. I take a look afterwards to our 3 to 4 o'clock and see another aircraft about 1/4 mile and moving towards us. We immediately banked left away from traffic. The aircraft was close enough that I could read the tail number before we banked away.At 6;000 feet over DVT is where the floor of the Class B airspace begins. This aircraft had to have been at our altitude and in the Class B airspace at that point. Between all 3 aircraft that were within our proximity; ATC only issued one traffic report to us as we received the first TA. We called traffic in sight when I noticed the first aircraft. ATC did not provide any information on any other traffic around us or any resolutions during that time afterwards.After banking away (not deviating from any altitude or heading assignments); we informed ATC of the situation; including that we could read tail numbers to give an indication of proximity.
Air crew in Phoenix Class B took slight evasive action for an aircraft. The pilot observed three different aircraft that he was alerted to by TCAS. TRACON only issued traffic for one of the aircraft; not the one the pilot had to evade.