ZHU controller turned aircraft in I90's airspace without coordination to maintain separation.

Attributes
ACN	647665
Time
Date	200502
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	msl single value : 14700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : i90.tracon
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 21 controller time certified in position1 : 17
ASRS Report	647665
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Miss Distance	horizontal : 32400 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Airspace Structure
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

Aircraft #1 departed iah. He came to my frequency climbing to FL180 restr to 250 KIAS by hou approach. I climbed him to FL230 and asked him his speed. When he told me that he was restr to 250 KIAS; I increased him to 300 KIAS. Right after this aircraft #2 checked on my frequency level at 15000 ft. I asked him his speed and he responded 290 KIAS. At this time; the conflict alert activated. Aircraft #2 was less than 6 NM behind aircraft #1 who was leaving 14700 ft climbing to FL230. I issued an immediate turn to aircraft #2 while he was still within hou approach airspace. Because of the turn; radar separation was not lost. At the time of this incident as well as at least 1 hour before and 1/2 hour afterwards; the sector was extremely busy and complex. The hou lrr was OTS causing a disruption of the normal way in which we work this busy departure sector. No traffic management restrs were put in place to manage the increased complexity of the sector. Subsequent to this incident; I became so busy that I was not able to keep up with taking handoffs from I90 in a timely fashion and I90 ended up 'spinning' 1 aircraft.

Original NASA ASRS Text

Title: ZHU CTLR TURNED ACFT IN I90'S AIRSPACE WITHOUT COORD TO MAINTAIN SEPARATION.

Narrative: ACFT #1 DEPARTED IAH. HE CAME TO MY FREQ CLBING TO FL180 RESTR TO 250 KIAS BY HOU APCH. I CLBED HIM TO FL230 AND ASKED HIM HIS SPD. WHEN HE TOLD ME THAT HE WAS RESTR TO 250 KIAS; I INCREASED HIM TO 300 KIAS. RIGHT AFTER THIS ACFT #2 CHKED ON MY FREQ LEVEL AT 15000 FT. I ASKED HIM HIS SPD AND HE RESPONDED 290 KIAS. AT THIS TIME; THE CONFLICT ALERT ACTIVATED. ACFT #2 WAS LESS THAN 6 NM BEHIND ACFT #1 WHO WAS LEAVING 14700 FT CLBING TO FL230. I ISSUED AN IMMEDIATE TURN TO ACFT #2 WHILE HE WAS STILL WITHIN HOU APCH AIRSPACE. BECAUSE OF THE TURN; RADAR SEPARATION WAS NOT LOST. AT THE TIME OF THIS INCIDENT AS WELL AS AT LEAST 1 HR BEFORE AND 1/2 HR AFTERWARDS; THE SECTOR WAS EXTREMELY BUSY AND COMPLEX. THE HOU LRR WAS OTS CAUSING A DISRUPTION OF THE NORMAL WAY IN WHICH WE WORK THIS BUSY DEP SECTOR. NO TFC MGMNT RESTRS WERE PUT IN PLACE TO MANAGE THE INCREASED COMPLEXITY OF THE SECTOR. SUBSEQUENT TO THIS INCIDENT; I BECAME SO BUSY THAT I WAS NOT ABLE TO KEEP UP WITH TAKING HDOFS FROM I90 IN A TIMELY FASHION AND I90 ENDED UP 'SPINNING' 1 ACFT.

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