Challenger 300
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 64; Flight Crew Total 7787; Flight Crew Type 149
Communication Breakdown; Situational Awareness
ATC Issue All Types; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance; Flight Crew Became Reoriented
Human Factors; Procedure
While transitioning between the Arrival and Initial Approach phases we were instructed to descend from 8000 feet to 4000 feet and given a heading of 250 degrees. Just after passing through 5;000 feet we were given a clearance to slow to 210 knots first and then continue our descent. This must have sounded as descend to 2;000 feet. As we reached 2;300 feet we were given a new heading of 270 degrees followed by a 340 degree heading and to climb to 3;000 feet. Between these two heading changes we received a TA. As ATC instructed us to climb to 3;000 feet they also informed us that we had been assigned 4;000 feet. Upon landing the company notified me to contact ATC to discuss the event.The First Officer and I agreed that several factors may have contributed to the deviation. ATC assigning multiple clearance items simultaneously could have assisted as a cause. We were 1;000 feet from level off when we received a 210 knot speed reduction combined with another level off altitude. We were instructed to slow to 210 knots and then continue our descent. This combined with an ATC Trainee on duty could have helped create the deviation.
[Report narrative contained no additional information.]
BD-100 flight crew reported overshooting clearance altitude because they misunderstood the clearance.