|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : mem.airport|
|Altitude||msl single value : 2000|
|Affiliation||government : faa|
|Function||controller : approach|
|Qualification||controller : radar|
controller : military
|Experience||controller military : 6|
controller radar : 6
|Anomaly||non adherence : required legal separation|
non adherence : published procedure
|Independent Detector||other controllera|
|Resolutory Action||none taken : detected after the fact|
|Consequence||faa : investigated|
|Miss Distance||vertical : 300|
|Problem Areas||ATC Human Performance|
|Primary Problem||ATC Human Performance|
|Air Traffic Incident||Operational Error|
While working east final control; I was advised that all aircraft under my control needed to be at 2000 ft; due to the WX conditions above which were causing abnormal compression on the final. I complied with this. However; in the process; the final was abnormally long; and I unknowingly vectored several aircraft at 2000 ft into a 2300 ft MVA. No other controllers or supervisors in the room alerted me to the fact; and no equipment alerts activated. At least 2 other controllers; that I'm aware of; encountered a similar situation. The facility is investigating.
Original NASA ASRS Text
Title: MEM TRACON CTLR DESCRIBED LOSS OF TERRAIN SEPARATION EVENT; ALLEGING WX AND EXTENDED FINAL AS CONTRIBUTORY FACTORS.
Narrative: WHILE WORKING E FINAL CTL; I WAS ADVISED THAT ALL ACFT UNDER MY CTL NEEDED TO BE AT 2000 FT; DUE TO THE WX CONDITIONS ABOVE WHICH WERE CAUSING ABNORMAL COMPRESSION ON THE FINAL. I COMPLIED WITH THIS. HOWEVER; IN THE PROCESS; THE FINAL WAS ABNORMALLY LONG; AND I UNKNOWINGLY VECTORED SEVERAL ACFT AT 2000 FT INTO A 2300 FT MVA. NO OTHER CTLRS OR SUPVRS IN THE ROOM ALERTED ME TO THE FACT; AND NO EQUIP ALERTS ACTIVATED. AT LEAST 2 OTHER CTLRS; THAT I'M AWARE OF; ENCOUNTERED A SIMILAR SITUATION. THE FACILITY IS INVESTIGATING.
Data retrieved from NASA's ASRS site as of May 2009 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.