<< >> NASA ASRS Report 806580, September 2008

ZFW controller experienced operational error at 3000 ft between localizer approach and departure aircraft from opposite runway directions; attempt at altitude separation failed.

Attributes
ACN	806580
Time
Date	200809
Place
Locale Reference	airport : txk.airport
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	other
Make Model Name	Military Trainer
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer only : 4
Flight Phase	descent : approach
Route In Use	approach : instrument non precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 17 controller time certified in position2 : 10
ASRS Report	806580
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 20000 vertical : 600
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Controller cleared aircraft for localizer back course runway 4 to txk; when ATIS had ILS runway 22. There had been several practice approachs done by a couple of aircraft in the last 15 mins; all for localizer back course runway 4; when runway 22 was the active. This was all coordinated with the tower controller. However; I forgot the active was runway 22 when tower called and requested release on the rj. I remembered just as the rj was rolling; and called tower to stop the rj at 2000 ft. Inbound was cleared only to 3000 ft. Though separated by the time radar identify was established; radar data indicated 4.8 mi and 6 ft closest proximity. An error report was filled out by our quality assurance department. The temperature in the bonham area of the control room was 66 degrees at console level; and 63 degrees exiting the floor register. My hands and fingers were continuously getting numb and stiff; and keyboard data entry was difficult toward the end of each shift; and was a definite distraction.

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Original NASA ASRS Text

Title: ZFW CTLR EXPERIENCED OPERROR AT 3000 FT BETWEEN LOC APCH AND DEP ACFT FROM OPPOSITE RWY DIRECTIONS; ATTEMPT AT ALT SEPARATION FAILED.

Narrative: CTLR CLRED ACFT FOR LOC BACK COURSE RWY 4 TO TXK; WHEN ATIS HAD ILS RWY 22. THERE HAD BEEN SEVERAL PRACTICE APCHS DONE BY A COUPLE OF ACFT IN THE LAST 15 MINS; ALL FOR LOC BACK COURSE RWY 4; WHEN RWY 22 WAS THE ACTIVE. THIS WAS ALL COORDINATED WITH THE TWR CTLR. HOWEVER; I FORGOT THE ACTIVE WAS RWY 22 WHEN TWR CALLED AND REQUESTED RELEASE ON THE RJ. I REMEMBERED JUST AS THE RJ WAS ROLLING; AND CALLED TWR TO STOP THE RJ AT 2000 FT. INBOUND WAS CLRED ONLY TO 3000 FT. THOUGH SEPARATED BY THE TIME RADAR IDENT WAS ESTABLISHED; RADAR DATA INDICATED 4.8 MI AND 6 FT CLOSEST PROX. AN ERROR RPT WAS FILLED OUT BY OUR QUALITY ASSURANCE DEPT. THE TEMP IN THE BONHAM AREA OF THE CTL ROOM WAS 66 DEGS AT CONSOLE LEVEL; AND 63 DEGS EXITING THE FLOOR REGISTER. MY HANDS AND FINGERS WERE CONTINUOUSLY GETTING NUMB AND STIFF; AND KEYBOARD DATA ENTRY WAS DIFFICULT TOWARD THE END OF EACH SHIFT; AND WAS A DEFINITE DISTR.

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.