ZFW-tak controller failed to timely coordinate with ZFW-fzt controller a change in altitude assigned in fzt controller's airspace resulting in operational error.

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Attributes
ACN	472034
Time
Date	200005
Day	Wed
Local Time Of Day	1801 To 2400
Place
State Reference	TX
Altitude	msl bound lower : 29000 msl bound upper : 30000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 11 controller non radar : 12 controller radar : 10 controller time certified in position1 : 2
ASRS Report	472034
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Supplementary
Problem Areas	Airspace Structure ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

I was working the fzt high, donie-I, and scy low sectors combined. I received a pointout on air carrier X, departure from dfw eastbound, deviating south, then direct cew. At the time, I did not have any traffic for him. Several mins later, I took a handoff on air carrier Y from over shv landing dfw. I determined that air carrier X was climbing very well and I would descend air carrier Y below him. I observed air carrier X mode C climbing through FL293 with climbing to FL330 in the data block. I descended air carrier Y to FL290 to pass below air carrier X. I next continued air carrier Y to FL280. I then observed air carrier X descending to FL290 with FL290 in the data block. I turned air carrier Y 30 degrees left and issued traffic. Air carrier Y missed the other aircraft visually. The tak high controller did not coordinate that he was going to descend aircraft to FL290 in my airspace and it took 46 seconds for him to update the data block showing that he had descended the aircraft.

Original NASA ASRS Text

Title: ZFW-TAK CTLR FAILED TO TIMELY COORDINATE WITH ZFW-FZT CTLR A CHANGE IN ALT ASSIGNED IN FZT CTLR'S AIRSPACE RESULTING IN OPERROR.

Narrative: I WAS WORKING THE FZT HIGH, DONIE-I, AND SCY LOW SECTORS COMBINED. I RECEIVED A POINTOUT ON ACR X, DEP FROM DFW EBOUND, DEVIATING S, THEN DIRECT CEW. AT THE TIME, I DID NOT HAVE ANY TFC FOR HIM. SEVERAL MINS LATER, I TOOK A HDOF ON ACR Y FROM OVER SHV LNDG DFW. I DETERMINED THAT ACR X WAS CLBING VERY WELL AND I WOULD DSND ACR Y BELOW HIM. I OBSERVED ACR X MODE C CLBING THROUGH FL293 WITH CLBING TO FL330 IN THE DATA BLOCK. I DSNDED ACR Y TO FL290 TO PASS BELOW ACR X. I NEXT CONTINUED ACR Y TO FL280. I THEN OBSERVED ACR X DSNDING TO FL290 WITH FL290 IN THE DATA BLOCK. I TURNED ACR Y 30 DEGS L AND ISSUED TFC. ACR Y MISSED THE OTHER ACFT VISUALLY. THE TAK HIGH CTLR DID NOT COORDINATE THAT HE WAS GOING TO DSND ACFT TO FL290 IN MY AIRSPACE AND IT TOOK 46 SECONDS FOR HIM TO UPDATE THE DATA BLOCK SHOWING THAT HE HAD DSNDED THE ACFT.

Data retrieved from NASA's ASRS site as of July 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.