Narrative:

While vectoring a C510 for a visual approach into teb; I inadvertently descended the aircraft below the MVA. I meant to descent the aircraft to 3;000 ft which is the MVA in that area but descended them to 2;000 ft. Radar contact was lost with the aircraft; however this was not unusual for the area that it was in. It is common place to lose the aircraft at 3;000 ft in that area; so initially I did not concern myself. In reviewing my strips I noticed I had written 2;000 ft on C510's strip. I asked the C510 to say altitude and they replied 2;000 ft. I immediately climbed the aircraft back to 3;000 ft and re-established radar contact. By this point the aircraft was reaching the step down from 3;000 to 2;000 ft on the MVA.

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Original NASA ASRS Text

Title: N90 Controller mistakenly descended an aircraft being vectored to TEB below the MVA.

Narrative: While vectoring a C510 for a visual approach into TEB; I inadvertently descended the aircraft below the MVA. I meant to descent the aircraft to 3;000 FT which is the MVA in that area but descended them to 2;000 FT. RADAR contact was lost with the aircraft; however this was not unusual for the area that it was in. It is common place to lose the aircraft at 3;000 FT in that area; so initially I did not concern myself. In reviewing my strips I noticed I had written 2;000 FT on C510's strip. I asked the C510 to say altitude and they replied 2;000 FT. I immediately climbed the aircraft back to 3;000 FT and re-established RADAR contact. By this point the aircraft was reaching the step down from 3;000 to 2;000 FT on the MVA.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.