PC-12
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 13
Communication Breakdown; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors
Aircraft X inbound to PIT from southeast already had checked in. Frequencies were combined and Aircraft Y was departing airspace to the north. Aircraft Y was already handed off to YNG Approach and requested a lower altitude. Aircraft Y was issued 3;000 and I immediately coordinated with YNG. While on the line I missed the partial read back of what turned out to by Aircraft X. I noticed Aircraft X descending and asked to confirm assigned altitude. Aircraft responded 3;000. Aircraft was still inside JST Approach Control airspace and our MVA (Minimum Vectoring Altitude) in the area is 3;400. Aircraft was descending through 3;300 and about 1 mile from PIT. I took no further action.Hearback/readback prior to coordination with adjacent Approach Control. I should have stopped aircraft descent.
PIT TRACON Controller reported missing a read back resulting in an aircraft flying below the MVA.