Narrative:

I was providing OJT to a deviation on the final approach vector radar vector scope. The student had 10 or 12 aircraft of various types on vectors to the ILS approach course. An medium large transport approaching from the west at 5000' was given a heading of 020 degrees and told to des to 4000'. A few mins later the same aircraft was told to turn right to a heading of 050 degrees and to des to 2000'. The aircraft started to penetrate an area with a higher minimum vectoring altitude (4000'). I somehow missed this until the low altitude alarm sounded in the control room. I then took the microphone and issued a climb to 4000' and a turn to 090 degrees. The only WX factor involved was a very strong south wind, causing problems with the different types of aircraft on final approach, from small single engine aircraft to jets.

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Original NASA ASRS Text

Title: ACR MLG ON VECTOR TO FINAL APCH COURSE DESCENDED BELOW MINIMUM VECTORING ALT.

Narrative: I WAS PROVIDING OJT TO A DEV ON THE FINAL APCH VECTOR RADAR VECTOR SCOPE. THE STUDENT HAD 10 OR 12 ACFT OF VARIOUS TYPES ON VECTORS TO THE ILS APCH COURSE. AN MLG APCHING FROM THE W AT 5000' WAS GIVEN A HDG OF 020 DEGS AND TOLD TO DES TO 4000'. A FEW MINS LATER THE SAME ACFT WAS TOLD TO TURN RIGHT TO A HDG OF 050 DEGS AND TO DES TO 2000'. THE ACFT STARTED TO PENETRATE AN AREA WITH A HIGHER MINIMUM VECTORING ALT (4000'). I SOMEHOW MISSED THIS UNTIL THE LOW ALT ALARM SOUNDED IN THE CTL ROOM. I THEN TOOK THE MIC AND ISSUED A CLB TO 4000' AND A TURN TO 090 DEGS. THE ONLY WX FACTOR INVOLVED WAS A VERY STRONG S WIND, CAUSING PROBS WITH THE DIFFERENT TYPES OF ACFT ON FINAL APCH, FROM SMALL SINGLE ENG ACFT TO JETS.

Data retrieved from NASA's ASRS site as of August 2007 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.