Challenger CL600
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 120; Flight Crew Total 4400; Flight Crew Type 340
Communication Breakdown; Situational Awareness
ATC Issue All Types; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance; Flight Crew Took Evasive Action
Human Factors; Procedure
On the LVZ4 arrival at; we were assigned a heading and altitude of 2000 after passing MUGZY waypoint. Descending through 3000 and approaching 2300 we received a low attitude alert; 'caution terrain'; from the GPWS. New York approach queried us seconds before the altitude alert saying 'Aircraft X maintain 3000'. The autopilot was disconnected; power was added; and a climb to 3000 was accomplished. We told New York approach that we were last assigned; and read back; 2000. We acknowledged the 3000 with a read back; the autopilot was re-engaged; and no further action was taken.
[Report narrative contained no additional information.]
CL60 flight crew reported receiving a low altitude alert from the GPWS and ATC on approach to TEB due to a clearance miscommunication.