Gulfstream V / G500 / G550
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 7.5
Communication Breakdown; Situational Awareness; Training / Qualification
ATC Issue All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors
On initial contact we reduced Aircraft X's speed then descended them to 063. They read back 036 and we missed it as a training team. They checked on to Tustin descending to 036 and they missed it as well. The pilot descended into the MVA and we lost separation with the MVA. We need to pay attention to the pilot read back.
SCT TRACON Controller reported a read back error that resulted in an aircraft descending below the Minimum Vectoring Altitude.