Air Traffic Control Fully Certified
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Human Factors
Two T6's; were on downwind. I turned the first T6 base and descended him to 3;000. Apparently; both aircraft took the turn and descended and the second T6 happened to be over an antenna with an MVA of 3;500. After listening to the tapes; I realized the second T6 readback the turn and descent as well. When I noticed the second T6 turning and descending; I immediately climbed him back to 3;500 and turned him back to downwind. The two aircraft came in to the airspace together; but I could have reminded them again of the similar sounding call signs. I also should have listened to the read back more closely.
TRACON Controller described a below MVA event when traffic with a similar call sign initiated a turn and descent issued to another aircraft; the Controller immediately issuing corrective action.